58cm trek road frame size

Your Bicycle Size Guide

Trek Bike Size Chart By Height In CM & Inches (Road Bike/MTB)

A Trek bike size guide is all you need when the search for the correct bicycle size is still on. Known to be the number 1 performance bike brand all over the globe, Trek has been stacked with powerful engineering and classy bikes.

There are many questions revolving around passionate fans of the brand with one of them being, what size Trek bike do I need?

Well, the answer is very simple. You will need to go through the charts below for a particular bike type and model you are looking for.

Trek size charts

Trek bike sizes can vary, and that can lead to more confusion among potential buyers. The below charts will help in choosing the right model according to your height and inseam.

Trek mountain bike size chart

Trek mountain bikes come in different categories and offer sizes for every individual, starting from extra small to extra large. Take a look at the tables below and select the ideal fit for yourself.

Category – Full suspension, Hardtails, Electric, Cross Country, Trail, Enduro, Downhill, Fat Bikes, and Fuel EXe (E-MTB)

Models/Series – Supercaliber, Top Fuel, X-Caliber, Procaliber, Farley, Roscoe, Marlin, Powerfly, Service, 820, Slash, Remedy, Fuel EX, and Session

Trek MTB Cross Country (820)

Trek e-mountain bike.

Models/Series – Powerfly, E-Caliber, and Rail

Trek road bike size chart

Road bikes are an essential part of the brand that caters to a wide range of audience, thanks to its diverse range of models. These Trek road bike size charts shall help you pick the right bicycle that can go a long way for an adventurous ride.

Category – Performance/Gravel

Models/Series – Madone, Emonda, and Domane

Category – Bikepacking/Cyclocross

Model/Series – 520 and 520 Grando

Models/Series – Checkpoint and Boone 6

Model Series – 1120

Trek electric road bike sizing

Models/Series – FX+, DUAL SPORT+, vEREVE+, and Allant+

Trek alpha sizing for MTB – what is it?

The old-school approach of measuring the frame size of Trek bikes is a thing of the past. With newer inventions and modern bike geometry, alpha sizing is used in place of numeric sizing on Trek mountain bikes.

Why is alpha sizing important?

1. Easier approach

Instead of using size numbers like 19.5, the sizes can be classified into S, M, ML, L, XL, and XXL. So, someone with a 17.5 size can go for the medium and a 19.5 is a large size. You don’t have to keep a tab on numbers; instead, the alphabet makes it easier.

2. Measurement based on reach

In earlier times the frame size measurement of Trek bikes was solely based on seat tube length. Things have changed, and modern mountain bike geometry focuses more on reach as of now. Hence, alpha sizing measures what matters and is a more simplified way of measuring bike size.

Trek sizing – virtual vs actual

This can puzzle you a bit as they both are somewhat similar yet there is a subtle difference. Actual size can be termed as the overall length of the seat tube from the center of the bottom bracket to the center of the top tube intersection with the centerline of the seat tube.

On the other hand, virtual sizing is the overall length of the seat tube ranging from the center of the bottom bracket to the mid-point of the imaginary horizontal top tube in which it connects with the seat tube.

If I had to give you an example, a bike might have a virtual size of 18.5 and an actual size of 17.5. This means that the bike size feels like 18.5, but in actual sense, the frame size is 17.5. It doesn’t make much of a difference as it is there only to let you know what it is (actual size) and what it looks like in size (virtual size).

People also ask

Trek 17.5 frame size – what does it mean.

A 17.5 frame size is considered an M size (Medium) in terms of alpha sizing. Any individual who is 161-172 cm or a height of 5’3.4”-5’7.7” . If you are within this height range, going for a medium size shall be the right choice.

Trek medium frame size is for what height?

A medium size frame size (17.5) is ideal for a person with a height between 5’3.4”-5’7.7 ”. In centimeters, it is ideal for those around 161 to 172 cm in height.

Trek 24-inch bike is for what age?

When it comes to children, their bikes are measured in terms of wheel size instead of the standard frame size. These kid’s bikes have a size range between 12-26 inches, depending upon the height of the kid.

As far as a 24-inch wheel size is concerned, any kid between the ages of 8-11 can go for a fun ride with it. Some of the popular 24-inch bike models are Trek Roscoe 25, Wahoo 24, Trek Precaliber 24 , etc.

Trek 26-inch bike is for what height?

A 26-inch wheel-size bike is for kids with a height of 4’9”-5’3” (146-160 cm) . Wahoo 26 is a prime example of a bike in this category.

Trek 20-inch bike is for what age?

Trek 20-inch bikes are for children between 5 to 8 years of age. Additionally, if they are within the height of 3’9”-4’6” , it should be suitable for them.

Are Trek bikes good?

Trek bikes are considered to be extremely good and solid in build. It is known to be the number 1 performance bike brand all over the globe. Having its humble beginning in the year 1976 in Waterloo, Wisconsin, it has turned into the largest bicycle manufacturer all over the world. With an array of bikes ranging from, mountain, road, electric, and kids bikes, there is a lot to choose from a mammoth list.

How much is a used Trek bike worth?

It depends on a lot of factors in terms of how old the bike is, the year of production, which model, and a lot more. However, it can be within $1000-10,000 (depending on the model and other factors) .

Where are Trek bikes made?

The majority of their bikes are manufactured in Taiwan, China, Netherlands, and Germany too.

Why are Trek bikes so expensive?

Usually, the bike brand prefers top-tier components, suspensions, and frames that are ahead of its competitors. This results in additional costs that can be seen in the price tag and also many top-end Trek bikes are custom-made with less production, leading to being more expensive.

Trek bikes are a class apart in many ways with a range of bikes on offer for its fans across the world. Choosing the right size for you can be tricky, but this is where the Trek frame size chart comes to the rescue.

Trek as a bicycle brand might be on the costly side, but they punch above its weight to provide top-class bikes for the masses. I am always someone who roots for quality, and Trek provides what I need.

One comment

Thanks for your informative post. I really like the Trek alpha sizing for MTB because Trek frame sizes use alpha sizing rather than the usual inches or centimeters (cm), and they usually have a certain range of measurements.

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Road Bike Size Chart: A Simple (But Complete) Guide

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Many road bikes typically come in 2 styles that include sportive road bikes (that have short top tubes & high front ends for more comfort) and racing road bikes (these are long in their top tubes & low for fast riding at the front). Nowadays, there has been an increase in cyclocross bikes.

These are typically for casual off-road drives. Hence, it has led to the invention of new adventure road bikes. They are drop-bar and lightweight bikes for a mixture of terrains, trails, and roads. For detailed information on the  road bikes size chart,  keep reading this article.

Road Bike Sizing Guide for men, women & Kids

You need to select an appropriate size of a road bike frame for a new bike that does make all the difference. It is so as when the bike fit is ideal, then you would feel more comfortable while riding. The handling of your road bike would be simpler, and you would enjoy the riding experience more.

In this road bike size guide, we would tell you how simple it’s to look for the right bike size by simply using the following bike size charts (men, women, and kids) for the particular road bike that you are quite interested in.

Road Bike Size Chart for Men

Road Bike Size Chart for Women

Every road bike might look quite similar. However, in case you try out some male’s bike, then you would quickly come to know that it isn’t quite as comfy as you will like. Hence, a good way to purchase a road bike is to see female bike sizes for several types of road bikes.

Surely, this is not a thumb rule, but it provides you a clear notion of what you’ll be looking for. When your road bicycle is delivered, then you might make some necessary adjustments on the handlebars and saddle and all other parts for making sure that you’ll get a perfect ride experience every time.

Road Bike Size Chart for Kids

You can look at following road bike sizing chart for kids to see how kids’ road bikes are defined and measured. You will get a clear idea about what you are actually looking for while shopping for some specific road bike. A crucial thing to keep in mind is that you can measure children’s road bikes by using the tire diameter (outside). It’s just opposite to adult road bikes, whose measurement refers to the bike’s frame size.

One real challenge in picking a child’s road bike is to exactly knowing that the child would outgrow this not long after you buy a bike. Hence, you are facing a serious dilemma. Also, do you purchase a good road bike that would likely be a bit smaller? And, do you buy some big-box clunker that is a temporary and cheap solution? In this case, you are anticipating that a road bike does not fall apart at all or otherwise is such a bad choice which it does turn your child off to riding altogether.

This is a basic question without a simple answer, but probably a couple of other choices that you might explore to assist yourself out. First of all, do you’ve other children, younger or older, that you might give this road bike to them? If this is the case, then it does make the question even simpler about whether or not to consume money on some decent road bicycle.

How about your extended family members, cousins & the like? Also, are there any families in your neighborhood with children that you might set up a kind of road bicycle exchange with?

One more good idea is to resale the road bike. In case you have some connections with the other cycling lovers who have children, they are even more likely to come to know & appreciate the true value of a nice road bike. Offering this for sale, such as you will an adult’s road bike, is a great way to retake some of the investment.

Lastly, certain road bike shops & online retailers (that include Performance Bike) typically offer you some programs for buying children’s road bikes.  The main premise is that if you purchase a child’s road bike, you will get either guaranteed trade-in value on your old road bike in case it’s outgrown or some straight out discount offers on the future road bikes. This is quite advantageous because the child continues moving through the road bikes into the large sizes.

What is important to look out for when choosing the right road bike size?

Seeking the proper road bike size is not difficult anymore. All you have to do is simply measure your own height. Now, look at the above road bike sizing chart. You may also want the measurement of your inside leg as different bike brands such as Giant typically use this measurement and height in their particular bike sizing charts.

We have also teamed up along with different professionals to inform you how simple it’s to select the perfect size bike if you are going to buy it online. Also, we offer some useful tips about how to select the best size road bike for yourself when you’re in-between sizes.

Sizes for Different Types of Bikes

The mountain bike sizes and road bike sizes are a bit different. Also, the units that are there in different bike sizes differ, relying on the brand and type. The road bike size charts are generally in centimeters, whilst the mountain bike size charts are available in inches . By luck, our road bike size chart does take away the guesswork because it also tells you road bike frame sizes in inches as well as centimeters. It would be very helpful for you while buying a road bike.

There are a lot of bike manufacturers who typically quote their road bike sizes such as L, M, S, or large, medium or small, etc. on a few or all of their products. Children’s road bike sizes generally depend on the wheel size. Many MTB sizing guides would use inches whilst you may find a road bike size in centimeters. So, it is good for you to know both of them

Sizing in Store

In case you have a road bike just in front of you, just stand straight at the center of the top tube. Also, there must be clearance between the bike and you that is 2 to 4-inches for the mountain bikes & 1 to 2-inches for the road bikes. Are you worried about a seat height sitting properly? Stop worrying. Once you have found the exact size for your road bike from a trial test drive, you might easily adjust your bike to fit properly.

Sizing Online

In case you do not have a road bike just in front of you, then the most crucial measurement for you to know is the inseam. An inseam measure is typically the length from the crotch down to the feet. When you‘ve got this measurement, you can easily use your chart as a buying guide for the best road bike size.

How proper must a road bike fit look like?

As you have selected a right frame bike size; however, that does not mean your road bike fits properly. There is a lot more you should – can – do in order to tune the machine to your body. Why this?

• To go further and faster
• To avoid any type of injury
• For greater pleasure and comfort

The following are the top five techniques to keep your road bicycle setup easy.

1. Adjust the Reach

If you stretch from a bike’s saddle to its bars, it determines the riding position. Plus, your spine must lean at about 45 degrees so you would be able to reach all parts of your bike’s bars conveniently. You should bend your elbows slightly. The excessive stretch is also very common, particularly for females, who usually have relatively short torsos as compared to males.

You might reset the reach along with long or short bars or stems with a totally different reach. Like, for instance, the aluminum OS-99 CSI, ultralight carbon, and aluminum SL-K provide stem along with the +/- 6º rise. It is there in all sizes that are from 70mm up to 140mm, which allows different adjustments. Amongst FSA’s different stems is an SL-K. It contains high-grade aluminum & weighs only141g in a hundred mm length.

2. Adjust the Bar Angle

You can easily neglect the old suggestion regarding drops parallel to the surface – it’d almost surely put so much weight on the hands. You can simply rotate your bars until you get a nice bend in the wrist. Plus, the hoods must not pull the thumbs, such as wishbones.

Your height is a major key. In case you are racing, you will need the bar a bit lower than your saddle. However, otherwise higher or even level is just fine. Its major defining factor is a great level of comfort.

In addition, carbon fiber also damps the vibration for more long-distance performance. On the other hand, a shallow drop, just like a 125mm K-Force Compact, is comfortable as well.

In case you are racing, then you still should not worry about as the 150mm-drop K-Force New Ergo bar offers large-radius curves & a flat, wide top to decrease your fatigue.

3. Adjust the Saddle

As you know, seat height is very much crucial. Your knees must bend a bit at complete extension. You can also adjust via raising your saddle until the leg is completely straight with the heel on your pedal. In case your hips are rocking, then your saddle must be quite high.

Along with the level of pedals, the forward kneecap must sit properly above the road bike’s pedal axle. The laser pointer or plumb bob does assist here a lot. It is not a strict law, though: as you might also reset it to fine-tune your weight on the hands. Pressure must not be very much, but a little.

Lastly, the ‘right’ angle does not put much pressure on the center or front of the pelvis. You need to try to avoid the forward tilt of above some degrees, as it puts a huge weight on the wrists, which is not good at all. You must have a good and durable Seatpost for this. For example, lightweight SL-K posts give you incredibly great adjustments along with the fatigue-decreasing compliance of carbon too.

4. Adjust the Cleats and Pedals

Pressure hot spots typically cut circulation, whilst wrong angles put stress on your legs and knees. These things aren’t good at all for you! If clipped in, balls of your feet must be over your pedal axle, or a tad ahead of the pedal axle. In case you are straining your Achilles tendons or calves, reset your cleat towards your heel. When the arches are sore, then you need to move this towards your toe.

You should look down carefully when pedaling your road bike; the knee must be over the foot. You can easily adjust your cleat side to side; hence the feet are neither inside nor outside your knees. The cleats must mimic the toe-out/in an angle of the feet – and keep this in mind that they may not be similar on each side.

5. Check the Frame

When you are still trying hard to get a well-balanced position, then you might want to think again about the frame size of your road bike after all. The length of the top tube might just be not correct. As a casual guide, we will expect you to see:

• 160centementer-169centemeter (5feet 3inches to 5feet 6inches) bikers on 52- 53centemeter frames
• 171centemeter-181centemeter (5feet 8inches to 5feet 11inches) bikers on 54- 56centemeter frames
• 183centemeter-193centemeter (6feet to 6feet 4inches) bikers on 56-58centemeter frames

Combining the above 5 tips, you must get the maximum road bike fit along with the advantages of cycling longer and faster in better ease, and avoiding any chance of injury.

Invest in a Road Bike Fit

Selecting a professional road bike fit before buying might make a great difference. That is why Missy Erickson, who is a fit specialist and owner at ERO Sports, suggests that the Pre-Purchase Bike Fit for every athlete. “This does not matter when you are purchasing a new road bike from some bike shop, ordering your road bike online, or getting off Craigslist,” she said.

“Knowing about every fit dimension & having a fit expert assist walk one through the whole process and not only makes sure that you’re getting the proper size but your road bicycle also for some specific requirements.”

The road bike fit would also offer all your detailed measurements. Like, for beginner athletes and cyclists, it might be very helpful. Erickson says, “Investing in the bike fit makes sure that you are about to have the right bike. Plus, you will also be going to set up your bike perfectly.

It would ultimately avoid any kind of discomfort, injury, and pain that would make roadside cycling more enjoyable as compared to this already is”.

What if I got my road bike size wrong?

If this happens, you should immediately tell your merchant, who will easily exchange that road bike. In case you do not need to do this, then you might do the following important things:

• purchase a shorter or longer stem. This would change the position of your body
• move the saddle backward or forward
• to get a long seat post

You should give it some time to get the feeling right. As I remember that time when I bought my very first 29er road bike. This felt just like a huge ship & seemed too much tough to ride that in the forest or narrow trails.

However, I have become so much familiar with my bike after some time and could ride with full skill and comfort that while I sit on the 26″ road bike, it does seem so ridiculous how small it’s.

Road Bike Sizing Calculator

The road bikes come with thinner tires as well as light frames. They are specially made for riding on paved and smooth surfaces that include roads, paths, and streets. A few of them might even handle gravel roads or dirt. There are so many different types of road bikes. The road bikes are generally used for commuting, racing, and touring.

Whilst styles differ, the main approach to road bike sizing does remain the same that is using the rider’s leg length and height to determine proper frame size. There is a road bike calculator that recommends the road bike frame size, depending on the measurements that you take. In case you do not know about your leg length, then you would get a large range of different frame sizes in order to try them out.

Do you have an Appropriate Ape Index?

You must know when you need a short or long reach. It does mean that you want to look for your “ape index” (that is the arm span as compared to the height).

• When you get the positive ape index (that is your height is smaller than the arm span), then you need a longer reach & you must also opt for the bigger of the sizes.
• When you get the negative ape index (that is the arm span is smaller than the height), then you need a shorter reach & you must also go for the shorter of the sizes.

Try Before You Purchase

It is much overused and obvious suggestion out there. However, it is true: Seeing the bike for yourself in person, trying that out, & having a feel for it’s usually the perfect way to come to know whether it is suitable for you or not.

Most bike shops and bicycle brands give demo events or days for allowing clients to test road bikes. This also assists to ask a few important questions and directly speak to expert staff members. Also, as an additional bonus, the customer avoids some potential damage like from shipping. You will not need to assemble it yourself.

Getting the exact size of your road bike is quite significant, and if this is your very first road bike, then you must pay more attention.

The exact sized road bike would be more efficient, quite comfortable, and great fun for you to ride. You should know very well about your  road bike size chart  just before you purchase it. It would surely make the entire process easier.

By doing so, you will be able to set up for successful bike rides right from the very beginning. Quite often, however, there’re some other ways as well to know whether your setup is right or not like a poor fit. Happy Riding!

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Road Bike Size Chart & Fit Guide

Use this road bike size chart and fit guide to determine the perfect size bike for you. Road biking is all about efficiency and performance, so it’s crucial to fine-tune your bike fit. We’ve included additional details about riding style and frame geometry, so you can pedal comfortably all day long.

Our breakdown of the most important measurements on a road bike makes road bike geometry easy to understand. Keep scrolling to learn how to measure yourself and compare your numbers with the road bike size chart below.

Road Bike Size Chart Choosing Road Bike Sizes Road Bike Measurements Road Bike Geometry Road Bike Fitting Road Bike Size FAQs

Road bike size chart

Use this chart to quickly find your approximate road bike size, but remember that bike fit is much more than a single metric. Measure your height as well as leg inseam for a more accurate size recommendation.

Cyclists can also choose to size up or down depending on their preferred riding style. Many pros use a smaller frame to achieve a more aggressive, aerodynamic position. If you fall in between road bike sizes on the chart, the general rule of thumb is to pick the smaller frame option.

Most bikes nowadays are unisex, meaning any rider, regardless of gender, can enjoy them. Our chart allows all riders to figure out their suggested frame size, rather than being just a mens road bike size chart. Some women-specific bikes have unique geometry while others have contact points that better suit women, such as narrower handlebars and an appropriate saddle.

What is the right size road bike for me?

Road bike sizing is based mainly on rider height. Measure your height accurately and check out the useful road bike size chart below. Height isn’t the only metric, though; these other factors can help you fine-tune your bike fit:

Choose by leg inseam

Some manufacturers provide bike sizing recommendations according to leg inseam. 

People have different proportions and riding a frame size that matches leg length makes pedaling more efficient.

If you're new to road cycling, choosing a  size based on your inseam a great place to start and you can use our road bike size chart above. If you want to learn more of the ins and outs of road bike fitting, keep reading.

Choose by riding style and preference

If you're a seasoned rider or you want to do more research in order to get the perfect fit, you'll also want to consider your preferred riding style. 

While the inseam measurement is still a great place to start, you can more easily decide between two sizes by looking at other bike-specific geometry measurements.

Based on how those measurements affect the bike, you can decide which of two sizes is better suited to how you ride.

How to measure yourself for a road bike

Measure your height by standing upright against a wall with your shoes off. Be sure to look straight ahead and keep your shoulders back. Mark the wall above your head with a pencil, holding the pencil flat and parallel to the floor. Then use a tape measure to calculate your height from the floor up to that mark.

To find your leg inseam, stand with your back against a wall and hold a book between your legs. The book’s spine should meet your crotch. If you’re alone, make a small mark where the spine hits the wall. Or a friend can measure from the top of the book down to the floor, in centimeters or inches.

Leg inseam is an accurate representation of the distance from the saddle down to the pedals and is important to get right for an efficient pedaling position.

How are road bikes measured?

Seat tube length

Traditionally, road bikes were sized according to seat tube length, or the distance from the center of the bottom bracket up to the top of the seat tube. Frames were labeled with that measurement in centimeters rather than inches.

However, measuring the seat tube is no longer an accurate way to size a modern road bike. Nowadays, many bikes companies use approximations in order to keep their bike sizes aligned with the well-known CM sizes (like 54, 56, 58, etc) because modern geometry is a bit different. Some manufacturers also use alpha sizing (XS, S, M, L) to keep sizing consistent across models with different geometries.

So while seat tube is an important factor to consider, it is one of several key measurements that go into establishing a road bike frame as one size or another. Below are some of the other important measurements and how they affect frame size and general handling.

Headtube length

Headtube length is another factor to how far you need to bend over in the riding position. A taller headtube essentially raises the handlebars closer to your body. 

While riders can use headset spacers to make small adjustments, it’s always better to use a frame that has a headtube length that matches your measurements. An appropriate headtube is much stiffer than the same effective length achieved using spacers at the top of the steerer tube. 

Endurance bikes typically have longer head tubes than more aggressive race bikes.

Effective top tube length

The modern sloped top tube design, measured using effective top tube length, affects the reach of a bike. 

A longer top tube means there is more space between where you sit and where you place your hands which determines upper body posture. 

Too long of a top tube and you will feel stretched out while a short top tube makes for a cramped feel.

Chainstays and wheelbase

Chainstay length and wheelbase go hand in hand to determine a bike’s stability. Longer chainstays, measured from the bottom bracket to the rear axle, are a way to provide additional stability without affecting the rest of the frame too much, as well as providing wider tire clearance. 

Longer chainstays extend the overall wheelbase. A longer wheelbase is more stable over rough terrain or at high speeds, but a shorter length provides a more agile and responsive ride. Long chainstays are a popular feature on endurance and gravel bikes where steady handling is desired.

How does road bike geometry affect sizing?

A bike’s geometry determines riding position as well as the bike’s handling.

Race geometry Race geometry features a lower and longer riding position with a flat back and significant bend at the hips. This aerodynamic position has a lower center of gravity and offers more responsive handling, but can cause stress on the upper body over long distances.

Endurance geometry Endurance geometry has a more upright position with relaxed measurements designed for comfort and stability rather than aerodynamics. Riders can enjoy extended training sessions with less strain on their back, neck, and arms.

Reach Reach, or the horizontal distance between the bottom bracket and the top of the headtube, affects how far you lean over to grasp the handlebars. This can be altered by using a shorter or longer stem. Stack is the vertical distance from bottom bracket to top of head tube and is a good measure of how high the handlebars are relative to your upper body. Reach combines with the stack to determine bike fit.

A short reach and high stack make for a comfortable, upright enduro geometry. A long reach and low stack is an extended, aero riding position. This is why you might hear of pros ‘slamming their stem’ or removing all headset spacers to achieve the minimum stack height to force their bodies into a lower, more streamlined position.

Comfort is key However aerodynamic a position is, if you are noticeably uncomfortable, that means you are probably inefficient, too. It’s important to find the right balance between comfort and efficiency for your body.

To figure out your ideal bike geometry numbers, receive a professional bit fitting at any of our three Alberta locations.

Let us help you find the right size road bike

Nothing beats getting on a bike and going for an in-person test ride. If you are unsure about your bike size or have questions about a specific model, come on in and chat with our bike experts. 

Enjoy a test ride to feel the differences between distinct road bike geometries and discover what size road bike fits you. We offer precision bike fitting services to help you avoid injury or find additional performance gains.

Explore Our Top Road Bike Brands

Road bike size FAQs

What is the right size road bike for my height.

Check out our road bike size chart above to find the correct frame size for your height. You can double check the recommendation by measuring your leg inseam as well.

What size is a 54cm road bike?

A 54cm road bike is a medium sized frame appropriate for riders between 5’6" to 5'9".

What size is a 52cm road bike?

A 52cm road bike is a small sized frame ideal for riders between 5’3" to 5'6".

What size is a 58cm road bike?

A 54cm road bike is a large frame appropriate for riders between 5’9" to 6'0".

What frame size bike do I need road bike?

Road bike frames are sized according to rider height. Take an updated measurement of your height and check our road bike size chart above for a frame size recommendation.

I’m between sizes – which road bike size should I choose?

The general rule of thumb for road bikes is to size down if you are between frame sizes for road bikes. This avoids a stretched out riding position that can cause strain on the upper body.

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Bike Size Chart: How to Choose the Right Bike Size? (GUIDE + Calculator)

This guide will teach you how to choose the right bike size using bike size charts and other methods. It covers the most popular bike types, including hybrids/city, mountain, and road bikes .

Use this interactive calculator that recommends a bike size based on your inseam length and bike type. Alternatively, choose the bike size based on one of the three methods explained below .

Bike Size Calculator

DISCLAIMER: Please remember that the calculator does not consider your height, which may affect your bike size.

What Bike Size Do I Need?

To determine which bike size you need, use one of the following methods, sorted from the simplest to the most complex. Remember that simpler methods are less precise, while more complex methods offer greater accuracy.

Method #1: Bike Size Based on Your Height (The Easiest Method)

This is the easiest and quickest method to select a bike size. All you have to do is compare your height with the general bike sizing chart below .

However, this method doesn’t consider the type of bike, so it may not be as accurate as the methods below. As a result, the bicycle may not fit you perfectly.

Method #2: Bike Size Based on Your Inseam Length and Bike Size Chart

This is probably the best bike sizing method for most people. It is based on measuring your inseam length at home and comparing it with a bike size chart .

Once you measure the inseam length, use it to select the bike size. Most bicycle manufacturers use seat tube length and other details, including the standover height, in their bike size charts.

The standover height is the distance from the ground to the top of the top tube.

If your inseam length is shorter than the standover height, the bike is too big for you.

The clearance, which is the difference between your inseam length and the standover height, should be around 1 to 2 inches.

This clearance is essential to prevent injuries caused by sudden or emergency stops.

IMPORTANT NOTES

• The inseam length for choosing a bike size is measured differently from that used for buying pants. Learn more
• To choose the most accurate bike size, always compare your measurements with the manufacturer’s bike size chart for your bike type.

Hybrid Bike Size Chart

Depending on the manufacturer, hybrid bikes usually come in descriptive sizes (XS-XL) and heights. However, you may still encounter all three types of size designations – in, cm, and descriptive sizes.

And here is a helpful infographic:

Mountain Bike Size Chart

The size of mountain bikes is typically measured in inches (13″, 19″, etc.) or descriptive sizes (XS-XL).

Generally, smaller mountain bikes usually come with 27.5″ wheels, while larger ones have 29″ wheels.

And here are the sizes in the picture:

Road Bike Size Chart

Road bike sizes are usually given in centimeters or descriptive sizes.

You should take extra care when choosing the size of your road bike. Road cycling is a discipline in which you spend long hours in the saddle, so selecting the right bike size is crucial.

It’s also essential to choose the right type of geometry. For instance, endurance geometry road bikes (where you sit more upright) are suitable for beginners, while aggressive (sporty/performance) geometry requires a certain amount of flexibility.

The following road bike size chart also applies to cyclocross and gravel bikes .

And again, an infographic:

Method #3: Calculating the Bike Size

As we know from Method #2 , bike size is determined by the length of the seat tube. To effectively use this method, you must know the length of your inseam ( learn how to measure it correctly ).

To calculate the size of your next bike, use the following formulas depending on the type of bike you want to buy.

To calculate the size of your next bike, use the following formulas depending on the type of bike you want to buy. ( Source )

• Inseam Length (cm) × 0.685 = Hybrid Bike Size (cm)
• Inseam Length (cm) × 0.225 = MTB Bike Size (inches)
• Inseam Length (cm) × 0.665 = Road Bike Size (cm)

1 in = 2.54 cm 1 cm = 0.39 in

After you receive the result, round it up to the nearest whole number. This will match the bike size charts above with a slight deviation.

Example of calculating the MTB Bike Size:

Your inseam length is 33 inches, and you want to buy a new mountain bike. Let’s do the math:

Convert cm to inches: 33 inches × 2.54 = 83.8 cm Calculate the bike size: 83.8 cm × 0.225 = 18.8 ≐ 19 inches

The size of your new mountain bike should be 19 inches .

Example of Calculating the Road Bike Size:

Your inseam length is 70 cm, and you want to buy a new road bike:

70 cm × 0.665 = 46.55 cm ≐ 47 cm

As you can see, your new road bike size should be 47 cm .

How to Measure the Inseam Length?

To measure your inseam length, follow these five simple steps or watch the video below:

• Prepare a 0.75 to 1-inch (1.9-2.5cm) thick book and a tape measure.
• Take off your shoes and stand with your back to the wall.
• Put the book in your inseam, firmly pull it up, and hold it with your tights. Make sure the book is pressed against the wall on one side.
• Measure the length from the top of the book to the floor.
• Take the measurement.

NOTE : The inseam for choosing the right bike size is different (a few inches longer) from the inseam used to choose the pants’ size. Remember that inaccurate inseam length may affect the recommended bike size.

Once you measure your inseam length (and eventually also your height), you can compare it with the bike size chart of the specific bike type. Based on it, you can choose the correct size.

Choosing the correct bike size is easy when you know how to do it. You can use the bike size calculator that recommends a size based on your inseam length and bike type, or try one of the three methods I explain:

• The first method is simple but not very accurate. You only need to know your height and compare it with the universal bike size chart.
• The second method is the most accurate. First, measure your inseam length and decide what bike type you want. Then, compare your inseam length with the hybrid, MTB, or road bike size chart, and you’ll have the right size to buy.
• The third method requires some math but is more accurate than the first. You need to know your inseam length and use special formulas to calculate the size of your next hybrid, mountain, or road bike.

If you’re still unsure about what size bike to choose, please ask in the comments below or email me .

Choosing a Bike Size FAQ

I remember trying to choose the size for my first road bike. I asked a cycling forum for advice because I was stuck between two sizes. The forum members gave me some tips, but most were too complicated for a beginner like me. They suggested that I check the bike’s geometry, but I had no idea how to do that or compare it to my body measurements. So I asked my friend, who has been selling bikes for over 10 years at a local bike shop. He gave me the following advice: “It depends on what kind of rider you are. If you’re a recreational rider, go for a bigger frame. It’s more comfortable because you won’t have to raise the saddle as high as you would with a smaller frame. This will give you a more upright position, which is more comfortable. However, if you’re serious about cycling and want to race, a smaller frame will give you a more aerodynamic and aggressive position. Smaller frames are also more agile and lighter.”

There are several ways to choose the right size bike, but in this guide, I’ll explain three methods: 1. The first method is based on your height and a universal bike size chart. It’s the simplest but not the most accurate method. 2. The second method uses your inseam length and specific bike size charts for hybrid, mountain, and road bikes. It’s the most accurate method for most people. 3. The third method involves calculating the bike size using your inseam length and a unique coefficient that varies based on the bike type. It’s more accurate than the first method but not as accurate as the second. You can also use an interactive calculator that recommends bike size based on your inseam length. I recommend reading the entire article to better understand each method and decide which one works best for you.

Choosing the right bike size is crucial, not only for your comfort but also for preventing health problems. If your bike doesn’t fit you properly, you may experience pain in various body parts, such as your lower back, neck, and hands. ( Source ) According to Physio-pedia.com , there are four essential components of a good bike fit: correct foot position, saddle height, stem length, and handlebar position. However, remember that if your bike is two sizes too small or too big, you won’t be able to achieve a proper bike fit. Therefore, learning how to choose the correct bike size is important. You can avoid discomfort and potential health issues by selecting the right bike size. So, take the time to find the perfect fit for you.

If you have ordered a new bike the wrong size, I recommend returning it as soon as possible. Most online retailers allow returns. If you ride the wrong size bike, you risk injuring yourself (e.g., overloading certain muscles) or not being comfortable in the saddle. It also happens that even experienced cyclists ride the wrong size bike, so they often fail to adjust it to their liking.

It’s a bit complicated. The answer is mostly no, but there are some exceptions. Let me explain. Many people ask this question. But it is a wrongly asked question because bike size doesn’t depend on age. Our heights vary greatly, so a 19-inch bike may suit someone even if they’re not the “correct age” for it. The correct question is: “What height and inseam length is a 19-inch bike for?” With this information and the bike chart for the specific bike, you can determine who the bike is suitable for. Read the entire guide on choosing the right bike size for more information.

A 26-inch bike refers to a bicycle that uses 26-inch wheels. These wheels are commonly found on kids’ bikes, but some adult (mountain) bikes also use them. Nowadays, 27.5-inch and 29-inch mountain bikes are becoming more popular because they offer better comfort and speed. If you’re shorter than 5’0″ (150 cm), a 26-inch bike may be a good choice. However, if you’re taller, I recommend choosing a bike with at least 27.5-inch wheels. Check out this guide to learn more about selecting the right bike size.

Check out my collection of the top online bike stores in the United States and worldwide (Canada, Europe, and Australia) for inspiration.

About The Author

Petr Minarik

6 thoughts on “bike size chart: how to choose the right bike size (guide + calculator)”.

Thanks for the information!!

You are welcome. 🙂

Very informational. Thanks!

I am glad it helped, Richard. ????

Thank you for creating this comprehensive bike size chart! As a beginner cyclist, I found it really helpful in understanding my size and choosing the right bike. I’m looking forward to hitting the trails with my new ride. Great stuff!

Thanks Neil, I am glad you find it heplful. 🙂 – Petr

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Bike Frame Size Charts

Bike sizes for men.

Bicycle frames differ between those made for women and those made for men in a few ways, although not all frames are different as some are made for both genders.

Main difference is that on a bike frame made for men, the top tube is usually longer than those made for women. The reason for that is that men have longer torsos so frames have longer reach.

Mountain Bike Size Chart

Road bike size chart, hybrid bike size chart, bike sizes for women.

Bicycle frames for women have shorter top tube than mens bicycle frames, so that changes a bike geometry a bit. The reason for this is that women commonly have shorter torsos.

Womens Mountain Bike Size Chart

Womens road bike size chart, womens hybrid bike size chart.

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Trek Checkpoint SL 5

• AUS $ NZD $ USD $ CAD $ GBP £ EUR €

Size / 49cm, 52cm, 54cm, 56cm, 58cm, 61cm

At a glance

Where to buy.

Specifications

• Frame 500 Series OCLV Carbon, IsoSpeed, internal cable routing, downtube storage door, 3S chain keeper, T47 BB, rack and fender mounts, integrated frame bag mounts, flat mount disc, dropper post compatible, 142x12mm thru axle
• Fork Trek Checkpoint, full carbon, tapered carbon steerer, rack mounts, fender mounts, flat mount disc, 12x100mm thru axle
• Hubs Bontrager alloy, sealed bearing, centerlock disc, Shimano 11-speed freehub, 142x12mm thru axle
• Wheels Bontrager Paradigm SL, Tubeless Ready, 24-hole, 21mm width, Presta valve
• Tires Bontrager GR1 Team Issue, Tubeless Ready, Inner Strength casing, aramid bead, 120 tpi, 700x40c
• Chain Shimano 105 HG601, 11 speed
• Crank Size: 49, Shimano GRX RX600, 46/30, 165mm length; Size: 52, Shimano GRX RX600, 46/30, 170mm length; Size: 54, 56, Shimano GRX RX600, 46/30, 172.5mm length; Size: 58, 61, Shimano GRX RX600, 46/30, 175mm length
• Bottom Bracket Praxis, T47 threaded, internal bearing
• Front Derailleur Shimano GRX RX810, braze-on
• Rear Derailleur Shimano GRX RX810, long cage, 34T max cog
• Shifters Shimano GRX RX600, 11 speed
• Brakeset Shimano RX400 hydraulic disc, flat mount
• Handlebar Size: 49, Bontrager Elite Gravel, 38cm width; Size: 52, Bontrager Elite Gravel, 40cm width; Size: 54, 56, Bontrager Elite Gravel, 42cm width; Size: 58, 61, Bontrager Elite Gravel, 44cm width
• Saddle Size: 49, 52, Bontrager Verse Comp, steel rails, 155mm width; Size: 54, 56, 58, 61, Bontrager Verse Comp, steel rails, 145mm width
• Seatpost Bontrager carbon, 27.2mm, 8mm offset, 330mm length
• Stem Size: 49, Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 70mm length; Size: 52, 54, Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 80mm length; Size: 56, 58, Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 90mm length; Size: 61, Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 100mm length

Q: How much is a 2023 Trek Checkpoint SL 5?

A 2023 Trek Checkpoint SL 5 is typically priced around $3,399 USD when new. Be sure to shop around for the best price, and also look to the used market for a great deal.

Q: Where to buy a 2023 Trek Checkpoint SL 5?

The 2023 Trek Checkpoint SL 5 may be purchased directly from Trek .

Q: What size 2023 Trek Checkpoint SL 5 should I get?

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What is Road Bike Database?

Whether you're a seasoned cyclist or just starting out, choosing the right road bike can…

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About Road Bike Database

Explore, search and compare thousands of the world’s best road bikes here on Road Bike Database.

Compare prices, components, reviews, images and more on current and past road bikes. You can even share reviews, comments and questions on road bikes. View and compare a huge selection of bikes from brands such as Cervélo , BMC , Trek , Specialized and more .

We strive to provide accurate and up-to-date information for road bikes on Road Bike Database. If you’ve spotted any issues, please let us know . We also include helpful tools, such as our frame size calculator, to assist you in choosing the right road bike. Bear in mind that these tools serve as a guide and simply provide a general indication. Refer to information provided by your bike manufacturer for the most applicable information for your bike.

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Choosing the correct frame size is a crucial component of getting the most out of your road bike. It's not just about comfort: when a road bike fits properly, it's more efficient, easier to handle and better at transferring your power to the road.

Bikes come in a range of sizes. The best fit for you depends primarily on your height and inside leg. That's true whatever your gender, as gender matters far less in finding the bike that's best for you than other factors. Every rider deserves a bike that fits and feels great, no matter their body type, style of riding or level of experience. That's why we make great bikes for everybody and every body. If you find that you're in between sizes, choose the smaller size for a more aggressive position if you are more flexible or prefer lower handlebars. Choose the larger size for a more relaxed position with higher handlebars. Or, talk to your retailer or our experts here at Trek HQ for a quick consultation.

The Trek Size Finder

This online tool helps determine the bike size that’s best for you. You’ll need a measuring device for your height and inside leg. If you find that you’re between sizes, we recommend contacting your retailer or calling us on 02 6173 2400 (M–F) for a quick consultation.

Road bike size chart

Expert advice from Trek

Online resources are great, but there’s nothing like a real person. You can connect with your local Trek retailer directly, call and chat online with us at Trek Headquarters.

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How To Measure A Road Bike Frame

If you’re looking to buy or rent a road bike, be it new or used. You need to make sure that you know how to measure a road bike frame . If bike measurements do not fit you well, let’s just say there will be a lot of struggles for you. If you’re planning on getting a bike, the first thing you need to do is to get the measurements of the bike frame. 

To find the right measurement of your road bike frame, you will need to measure the top tube, the top tube is the horizontal tube that is connected to the road bike handlebars . You will also have to measure the seat tube, seat tube is the vertical tube that is connected to the seat of the bike. Now get a measuring tape and measure these in cm. We will explain it in detail, to read more scroll down. 

Here are four easy steps in detail so you don’t miss out on any step and make a wrong measurement. 

Step 1: For accurate measurement the top tube and the head tube should be in a straight line

Take a measuring tape and reach over to the frame from the handlebar to the other side, then take measurements of where the top meets. 

Step 2:  Now take measurements starting from the headtube to the handlebar

Now you have to make sure that this length is exactly the same as the top tube measurement. 

Step 3:  Measure the seat tube height

For road bikes, the seat tube measurement should be somewhere between 74 and 75 cm, and for Mountain bikes, it will be around 73 to 74 cm. 

Step 4: Measure the FRA or rear axle and the front axle distance

The rear and front axle is the place where you would want to mount your bike stand or training wheels. It should be somewhere around 26 inches to 29 inches long. This distance is also known as FRA. 

Table of Contents

How To Measure A Road Bike Frame In Cm

To Measure a road bike or any bike you will need a tape measure, a level, and a pen and paper to measure all the points of the bike. So you can buy it if it fits you perfectly. 

The length of the top tube till the saddle should be somewhere between 97-100 centimeters for females and around 102-122 for males. The top tube of the bike should be at least 20 cm longer than the saddle. If the top tube is not bigger than the road bike saddle , your leg muscles and back will be fatigued and ruin your posture. This can lead to many other ailments, so choosing the perfect fit for your road bike is very important. There should be enough space in the tube for a water bottle or you want to add an extra storage bag for holding your personal belongings. 

Height: 

Make sure that the height is not too high or too low for your body. If the height is too high, you will have a very hard time reaching the pedals from various angles and if it is too low then it will affect your posture. Usually, women go for lower bars and men go for higher bars due to the height difference. 

The seat post is an essential part of any bike, it connects the saddle to the bike. When it comes to the sizing it is clear that a taller rider needs a higher post whereas a shorter rider needs a lower one. 

The right length of a seat post is between 90 to 115 cm for females and 110 to 130 for males. 

There are bikes that have higher bars, typically the length for a male is 124 to 156 cm, and it is said for women to get a bike with a head tube length of 125 cm or in the range of 115 to 136cm. It all depends on the type of bike you want. 

How To Measure Yourself For A Road Bike Frame

Road bike frames are measured in two ways, one by top tube length and the other by seat tube length. 

The horizontal distance from the middle of the head tube of the bike is known as the top tube length of the bike, it is usually where the fork is attached to the frame of the bike. This measurement is expressed in centimeters and it establishes the overall performance and handling of the bike. 

The seat tube length is the length from the middle of the bottom bracket, in simple words the place where the pedals are attached to the frame of the bike. This measurement is also expressed in centimeters and it is a very important factor that helps determine the right frame size for you or your loved one. 

To Measure yourself and the length of the inseam, the steps are mentioned below. 

Step 1: 

First of all, stand up straight in a good posture. You have to place your foot on the ground with your heel. Now mark the height where it touches the floor. Repeat the same process with your other side and take out an average between them so you can determine how tall you are without your shoes. 

Now measure your chest over your nipples and for females measure over your bra, the one that you’ll be wearing while riding a bike. Keep your arms in a relaxed T position and slightly bent. 

Take these measurements while wearing clothes and jerseys that you wear while cycling. Make sure to get the measurements on the garments so they are accurate. 

Step 3: 

First, you measure from the inseam at the groin and up to the nipple height, after that repeat the same procedure on the other side and take out an average between both measurements. 

You can measure any leg, be it left or right around the thigh and just below the hip. Then take the measurements from the hip to the narrowest part of the thighs. 

Measure Height Without Shoes 

You will have to stand against a wall with your back aligned with the wall. Legs should be in a stable position. Not too wide apart and not too close. Just the right distance apart. You need to stand up straight in a correct posture, so the measurements are accurate.

How To Measure Trek Frame Size

Also Read: Bike Size Chart: Ultimate Guide For All Bikes  

Example of Trek Road Bike

How To Measure A Specialized Road Bike Frame

Example of Specialized Road Bike

How To Measure Vintage Road Bike Frame

Example of Vintage Road Bike Frame

How To Measure A Cannondale Road Bike Frame

Example of Cannondale Road Bike

What you’ll need to measure a road bike frame?

Being a cycling enthusiast is all fun and games until you start thinking about getting a new bike and the right height of the bike. To understand the right height of the bike, you’ll need to measure the frame of the bike. So, here we have mentioned the things you’ll need to measure the bike. 

Tape measure:

Almost all households have a measuring tape lying around somewhere and if not you should definitely invest in a good measuring tape. Measuring a bike with measuring tape is the most accurate way to measure. 

A level will help to see if the bike is standing up straight or not. This is a very important part of measuring a bike. 

Pen and paper:

When you start measuring the bike, you will take multiple measurements of different parts of the bike, this is why you will need to write the measurements down. 

This is the main character of our story. To Measure a bike you will need a bike. Right? Make sure you have taken all the extra accessories off of the bike. 

How to measure a road bike frame geometry?

Measuring bicycle frames are essential for determining the right size frame for you or your family. To measure the right frame size you will need multiple measurements, which include stem size, seat post length, reach, and wheelbase. Let’s explore these in detail:

Stem size is something that refers to how forward or backward it is placed from the center of the bike’s frame. 

Seat Post Length:

The seat post length is measured from the top of the seat post to the center of the bicycle frame. The height of the frame must be measured using this measurement in order to make sure that the rider can comfortably reach the pedals and maintain a proper pedal stroke.

The horizontal distance from the handlebars to the center of the bike is known as reach. The riding position and the comfort of the rider are dependent on this for the comfort and correct riding position. If the reach is longer the rider will have an aggressive riding position that can be ideal for racing and short distance. If the reach is shorter, the rider will have a relaxed posture that is good for long distances and comfortable riding.

Wheelbase: 

The wheelbase of the bike is the horizontal distance between the rear and front wheels. The measurement here is crucial for the handling and stability of the bike. A wheelbase that is wide will give more stability and high speed to the rider. Whereas the shorter wheelbase will make the bike more responsive and nimble. 

How to measure stack and reach in a road bike?

To Measure Stack and reach, measure the bike from the center of the bottom bracket to the top of the clamp on the straight handlebar and then multiply it with the digit 2.

The stack is how high the head tube of your bike sits, above the saddle of your bike. So what is preferred is having lower numbers with smaller bikes and larger numbers with taller bikes. 

Reach is measured from the point where you are able to touch or grip the hoods or under them to back to the axle where the front wheel meets comfortably. 

Read More How To Measure Hybrid Bike Frame Size – Chart

How to check road bike frame size?

When you think of buying a bike, and generally wonder how to measure the size of your road bike, you go and check the bike retail shop or visit the online store and contact customer service and directly ask about the bike frame size. 

If the bike is from an older version then you will have to do some work on your own. Let’s take an example and explore it a little. Let’s just say you need an 18-inch bike. But while reading the reviews you saw that they offer two different sizes one has an 18-inch frame and the other one has a 20-inch. So, how will you know which one fits you perfectly?

For that, you will need to measure yourself from head to toe and then divide your height by 2. For example, if you are 72 inches long, divide 72 by 2 which is equal to 32 inches i.e. you will need an 18-inch bike. This is one of the simplest ways to determine the right road bike size.

How do I choose a road bike that fits me correctly?

If you are investing your money in an off-the-rack bike, then you should probably measure yourself. So, you know exactly the length of your inseam and your height. Store employees usually know the right size chart for whatever height you give them. But if you have trust issues then you might also want to do your research. 

If you don’t want to get into all the hassle, then you can just get a bike that has an adjustable frame. Bikes like Cannondale, cyclocross, Trek, Giant’s Defy, or Specialized models. Most of these bikes have adjustable handlebar seats that can be adjusted. 

In conclusion, just like not having the right fit of shoes can cause you to be very uncomfortable and in pain, not having the right bike size will cause pain and damage. If you want comfortable and safe riding you need to get the right frame size for yourself. So if you’re still wondering how to measure bike size. Then you need to know the right measurements including height, length, bars, and seat post. 

Measuring yourself on your own can be difficult to get someone to help you to get the most accurate measurements. One measure can go a long way, this is not something you will have to do every time you ride a bike. You just need to know the right bike size and how tall you are. We have mentioned the road bike frame size chart.

How Do I Determine Bike Frame Size?

The easiest way to tell what size bicycle you need is by the height of your inseam, which for most people ranges from 24″ (61cm) to 36″ (91.44cm). This means that if someone has a 30 ” inseam, they need a bicycle with a frame size that measures 30″ or less.

How Big Is A 54cm Bike Frame?

A 54cm frame is the equivalent of a 20.75″ bike, which would typically be best suited for someone whose height is between five foot four and six feet tall

How Big Is A 58cm Bike Frame?

A 58cm bike frame size would usually be chosen by somebody that falls in the range of five foot two to five feet four inches tall.

How Big Is A 62cm Bike Frame?

A 62cm frame would be chosen by someone who is approximately five one-and-a-half to six feet in height, which makes this the best size for somebody that falls on either extreme of the spectrum.

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Bike Size Charts – For Men, Women & Kids

Understanding what size bike you need can be tricky, and if you don’t know where to start, it can feel like trying to navigate a maze.

There are multiple frame sizes to consider, and sizing methods differ based on your riding style and preferred manufacturer.

But finding the right bike size is actually easier than it seems!

We’ve created this guide to simplify and demystify the process , answering any questions you might have.

Our bike sizing guide has already been read 10 million times , proving its effectiveness and helping riders like you make informed decisions. Join the millions who’ve found their perfect fit.

By the end, you’ll have a much clearer understanding of how to choose the perfect bike size for your needs.

Why Trust Us?

How to get the right bike size, sizing by bike types, mountain bike size chart, road bike size chart, hybrid bike size chart, kids’ & junior’s bike size charts, how to know if a bike fits you well, frequently asked questions.

Why should you trust our bike sizing guide?

It’s simple: 10 million readers can’t be wrong. See for yourself:

Our guide has not only been read by millions trying to find their ideal bike size, but we’ve also directly assisted over 1000 individuals find their perfect fit in the comments.

With years of experience both as cyclists and helping others find their way in the cycling world, our bicycle sizing insights and tips come from real-life experience.

If you still have questions or need further guidance after reading the bike frame size charts below, feel free to reach out in the comments and we’ll help you find the perfect bike size for your height.

Choosing the right bike size is essential for comfort, efficiency, and preventing injuries.

While test riding a bike is the ideal way to gauge fit, it’s not always practical, especially with the often better deals found online compared to local bike shops.

The good news is, you DON’T NEED TO test ride a bike to ensure a good fit. 

If you know your height and inseam length, you can get the right size by using a bike size chart.

However, this is where things get slightly more complex.

Bike manufacturers may use different sizing standards, such as centimeters and inches, or sizing labels such as S, M, L, XL. Sizing methods also differ based on bike types—road, mountain, and hybrid bikes are not sized in the same way.

If you’re starting to feel overwhelmed, don’t worry. Keep reading below and we’ll make things a lot clearer.

Should You Trust S, M, L, XL Bike Size Labels?

Many manufacturers also use size labels such as XS, S, M, L, and XL. These labels are becoming more common because they simplify things, but they can sometimes be vague and misleading.

Due to the lack of standardization across brands and bike types, you should avoid relying only on bike size labels when choosing the right size. Their dimensions may vary from one brand to another.

Letter-based size labels offer a good starting point but should be cross-checked with other methods.

For example, an L-sized Trek road bike may have a 56 cm seat tube length, while a Giant’s L-sized road bike may have a 58 cm seat tube length.

Therefore, you can use these labels as a rough guide, but make sure to also refer to a bike type-specific size chart (such as the ones below) or the manufacturer’s sizing chart for the specific model you’re interested in.

What and How to Measure?

To be able to use a bike frame size chart and correctly size a bike, you need to know two measurements: height and inseam (inside leg) length.

Why does inseam length matter?

The inseam length is important to ensure you get a bike with an appropriate standover height. This is the distance from the ground to the top of the bike’s top tube.

Ideally, to prevent injury and improve comfort, there should be a one-to-two-inch clearance between your crotch and the top tube when standing over the bike.

What you’ll need:

• A tape measure
• 30 seconds of your time

Measuring your height  is super simple. All you need to do is:

• Stand straight against a wall with your feet together.
• Place a book on top of your head, making sure it’s horizontal with the floor.
• Measure the distance from the ground to the point where the book and the wall meet.

Measuring your inseam is even simpler:

• Just stand against a wall with your shoes off and feet hip-width apart.
• Measure the distance from the ground to your crotch.
• That’s it!

With these two measurements written down, you’re pretty much all set to find the perfect bike size for your height and inseam.

Adult Bikes Are Sized by the Frame

Adult bikes are primarily sized by the frame; or to be more specific, they are sized by the seat tube length .

This is the vertical distance from the center of the pedal axle (the bottom bracket) to the top of the seat tube—it’s often listed in measurements like 52 cm, 54 cm, 56 cm , or 17 inches, 19 inches, 21 inches .

While this measurement is a good starting point, it doesn’t tell us all that we need to know—it determines the height of the bike, but not its length, also known as reach.

Why Does Reach Matter?

To really dial the fit, you should also consider the bike’s reach , which refers to the horizontal distance between the bottom bracket and the head tube.

Reach tells you how far you have to stretch to reach the handlebars and is especially useful if you’re in between two sizes.

A shorter reach means you’ll be sitting more upright when you’re riding—perfect for comfort on longer rides.

A longer reach means you’ll be more stretched out on the bike—ideal if speed and aerodynamics are your priorities.

Men’s vs. Women’s Bike Sizing

In adult bike sizing, the distinction between men’s and women’s bikes often comes down to marketing rather than significant sizing and design differences.

Therefore, the bike frame size charts below are suitable for all riders , regardless of gender.

Even though some brands offer models specifically labeled for men or women, and a few brands manufacture women’s bikes only (such as Liv or Juliana), the differences compared to unisex bikes are miniscule.

Men’s and women’s bike sizes are largely similar, with only minor differences driven by marketing. Most bikes are unisex!

These often include slightly different proportions between the bike’s stack (vertical height) and reach (horizontal length), which are negligible unless you’re a professional rider.

For example, women’s models might have a shorter reach compared to the stack to accommodate what some manufacturers perceive as average body proportions.

However, as body types differ among individuals, a women-specific bike might not automatically provide a better fit for every woman. Similarly, some men might find that a women-specific model fits them better than a men’s or unisex model.

Kids’ Bike Sizing: Sized by Wheel Diameter

Unlike adult bikes which are measured by frame size, kids’ bikes are determined by wheel size , simplifying the selection process.

Wheel diameters on kids’ bikes typically range from 12 inches to 26 inches , increasing in two-inch increments. This means that a 12-inch kids’ bike has 12″ wheels, a 14-inch bike has 14″ wheels, and so on.

Manufacturers then use these wheel size measurements to provide size recommendations based on a child’s age, inseam length, or height.

For example, a 12-inch bike might be suggested for children ages 3 to 5, with specific height or inseam measurements to further dial the best fit.

Many manufacturers provide additional information such as standover height and min/max seat height , which allows parents to get a better fit by relying on the inseam length measurement.

While wheel diameter and age can give a general idea of the right bike size, incorporating inseam length in the equation is advisable for the perfect fit.

While most adult bikes are sized by the frame, specifically by the seat tube length, sizing standards can differ slightly based on bike types.

For example, road bikes are typically measured in centimeters (cm), mountain bikes are measured in inches (in), while hybrid bikes may use either of the two.

Therefore, finding the ideal fit means you should be checking out bike type-specific sizing charts for road, mountain, and hybrid bikes, such as the ones below!

In recent years, mountain bike manufacturers have moved away from the traditional method of sizing bikes by inches and seat tube lengths.

Nowadays, a more intuitive system using size labels such as S, M, L, and XL is in use, prompted by more radical modern frame designs and geometries.

In addition to that, most brands also provide detailed geometry charts where you can find important measurements such as stack, reach, tube angles, wheelbase, and so on.

Our mountain bike size chart below is a great starting point.

26-Inch vs. 27.5-Inch vs. 29-Inch Wheels

Modern mountain bikes typically come with 27.5-inch or 29-inch wheels, whereas 26-inch wheels are mostly reserved for fat-tire bikes.

The choice of wheel size directly influences the bike’s handling and performance—smaller wheels improve handling and maneuverability, whereas larger wheels enhance speed and obstacle rollover ability.

However, when considering the right fit for a mountain bike, the impact of wheel sizes is limited and more nuanced.

In general, wheel sizes should not be used as a way to gauge the right fit of a mountain bike, even though it can affect the riding experience by changing the geometry of the bike.

Wheel size is crucial for riding performance, but not as important for sizing adult bikes.

For shorter riders, smaller wheels can improve the feeling of maneuverability and control, improving the riding experience. Smaller wheels also lower the standover height, which has a positive effect on comfort and safety.

Conversely, taller riders may prefer larger 29-inch wheels for smoother handling and the ability to maintain momentum.

This is why many manufacturers often align wheel sizes with frame sizes—smaller frames come with 27.5-inch wheels, whereas larger frames come with 29-inch wheels.

What If You’re Between Two Sizes?

If you find that you’re between two sizes on our mountain bike frame size chart, there are a few things you should consider to be able to choose correctly.

• Riding style: Size up if you’re an aggressive rider or size down if you’re more timid in your approach.
• Stability vs. maneuverability: If you prioritize stability, size up; but if you prioritize maneuverability, size down.
• Approaching obstacles: If you prefer taking the harder line and going over obstacles rather than around them, size up. Otherwise, size down.
• Ape index: If your wingspan is longer than your height, size up; otherwise, size down.
• Experience and flexibility: If you are an experienced rider and have a flexible body, feel free to size up. Otherwise, size down to feel more confident.

Road bikes are typically sized in centimeters by measuring seat tube length. Most manufacturers also use the letter-based size labels.

However, with the introduction of modern frame geometries with sloping top tubes, it’s a good idea to also consider more advanced geometry measurements, such as stack and reach.

This approach offers a more precise fit, ensuring optimal performance and comfort on the road.

Below, our road bike size chart offers the perfect starting place to pinpoint your ideal frame size.

Note: This chart can also be used to find the right gravel and cyclocross bike size due to their similarity to road bikes.

If you’re between two sizes on our road bike size chart above, you’ll want to consider these factors before making the final choice:

• Riding for speed:  If you prefer faster and shorter rides and races (such as crits), choose a smaller frame.
• Riding for endurance: If you prefer long-distance riding, such as gran fondos or audaxes, choose a bigger frame.
• Ape index:  If your wingspan is longer than your height, choose a bigger frame. Otherwise, choose a smaller frame.
• Riding position:  If you prefer being more upright when riding, choose a smaller frame. Otherwise, choose a bigger frame for more aerodynamics.
• Weight and stiffness: If you want a bike that feels stiffer and lighter (e.g. for sprinting), choose a smaller frame.

Hybrid bikes blend the characteristics of road and mountain bikes, prioritizing comfort, practicality, and versatility.

Most manufacturers size hybrid bikes (including commuting and fitness bikes) using the letter-based approach (S, M, L, XL).

This makes it easy to find the right size, especially considering the fact these bikes are used for recreation and commuting, rather for performance.

Choose your ideal hybrid bike size from the chart below.

If you’re between two sizes on our chart above, here are a few things to consider:

• Ape index: If your wingspan is longer than your height, choose the larger frame size.
• Riding style: If you plan to ride for leisure or commuting, a larger frame might offer a more relaxed posture. For more sporty fitness riding, a smaller frame will provide better control and handling.
• Standover height: Make sure your inseam length is at least 1-2 inches longer than the standover height on the frame size you’re considering.

As we’ve already mentioned briefly above, kids’ bikes are sized by the wheel diameter. This makes choosing the right size a lot more straightforward.

Check out our kids’ bike size chart below to get a general idea of which sizes to consider for your child.

But remember, for the best fit, it’s a good idea to measure your child’s inseam and compare it to the bike’s standover height and seat height range.

Finding the right bike size using a sizing chart is pretty straightforward and a great start.

But how do you know if your bike actually fits you perfectly?

Here’s a quick checklist to help you easily determine if your bike fits you well.

• Standover height:  If the bike fits you well, there should be 1-2 inches of space between your crotch and the bike’s top tube. This is especially important on bikes with a horizontal top tube design. To check, stand over the bike with your feet flat on the ground and pull the handlebars up. If the front wheel can come up 1-2 inches, you’re good to go.
• Saddle height: With your foot on the pedal at its lowest point (6 o’clock), your leg should have only a slight bend in the knee. A good fit shouldn’t require the saddle to be at its maximum or minimum height setting for you to achieve this.
• Reach:  How does it feel holding the handlebars while sitting on the saddle and riding? If you feel the handlebars are too far away and you need to stretch to reach them, the bike is likely too big. However, if you feel cramped and constrained with a rounded back and shoulders, you should probably size up.
• Overall comfort:  Do you feel comfortable and confident while riding the bike? If the bike fits well, you should be able to handle and maneuver it with ease, especially when cornering and accelerating on the pedals.
• Knee position:  Finally, if the bike fits you well, your knee should not be hitting the handlebars when pedaling. Also, the front of your foot should not be hitting the front wheel when turning the handlebars. If this happens, you need to size up.

Why sizing varies among manufacturers?

Sizing varies among manufacturers because they take different approaches to frame design, geometry, and tube measurements and angles. Brands also target different audiences and intended uses, all of which leads to sizing variations. That's why similarly sized bikes might fit riders of different heights.

What size push bike do I need?

Push bikes are typically sold with 10" - 14" wheels. A 10-inch push bike will usually fit kids aged 18 months to 2 years; a 12-inch push bike will fit kids aged 2-4 years; while a 14" push bike will typically fit kids aged 3-5 years old. These are just general recommendations—for the best fit, consider your child's inseam length.

What size bike do I need for my height?

To find out what size bike you need for your height, you should consult a sizing chart for the type of bike you're interested in, such as road, mountain, or hybrid. Depending on the type, bike size charts will match your height to a corresponding frame size denoted in centimeters, inches, or general sizes (XS, S, M, L, XL).

Is a 26-inch bike for adults?

A 26-inch bike can be suitable both for adults and for kids, depending on the context. Kids' 26-inch bikes are suitable for teenagers and shorter adults. However, some adult bikes, such as touring bikes, fat bikes or electric bikes, also come with 26-inch wheels, but these have larger frames and are not suitable for children.

What height is a 26-inch bike good for?

A kids' 26-inch bike (a bike with 26-inch wheels) is typically suitable for teenagers and shorter adults who are around 5'0" to 5'3" tall. However, bikes for adults with 26-inch wheels, such as fat bikes or some electric bikes, are often available in a few frame sizes and might fit adults who are 6 feet in height and taller.

How do I know if a bike is too big or too small?

A bike is considered too big if you cannot stand over the frame with both feet flat on the ground without the top tube touching your crotch, or if you have to stretch too far forward to reach the handlebars. Conversely, it's considered too small if you feel cramped when riding, can't adjust the seat high enough, or your knees hit the handlebars when pedaling.

___ Inch bike for what size person?

To determine which bike size is suitable for a particular height range, consult a specialized bike size chart for the bike type you're interested in, such as our road, mountain, and hybrid size charts above. These charts match rider heights with appropriate bike sizes, allowing you to get a proper fit.

Related Topics:

Top Dutch Bikes of 2024: A Comprehensive Buying Guide to Help You Choose

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Understanding Bike Box Dimensions: A Guide to Hassle-Free Bicycle Transport

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The ultimate guide to bike sizes: road, MTB, gravel and hybrid sizes explained

BikeRadar's beginner's guide to finding the right size bike

Paul Norman

One of the most important things to get right when choosing a new bike is the frame size.

Although there’s a lot you can adjust on a bike so that it fits better, if you start off with a frame that’s too small or too large for you, you may be placed awkwardly and uncomfortable as you ride.

That can result in aches and pains when cycling and your bike not handling as it should, both of which can have a negative impact on your enjoyment.

With that in mind, here’s everything you need to know about bike sizes – be it a mountain bike, road bike, hybrid bike, women's-specific bike or child’s bike.

How are bike sizes measured?

Bike sizes are measured in a number of different ways and, confusingly, there’s little consistency between bike types or between brands.

Road bike sizes are typically measured in centimetres, based on the length of the seat tube (from the bottom bracket to the top tube), although as we’ll see the actual seat tube length will vary dependent on the frame geometry.

On the other hand, mountain bike frame sizes are typically measured in inches, because they originated in the US.

You can’t compare mountain bike frame sizes directly to road bike frame sizes – not just because they’re in different units of measurement, but also because the frames on mountain bikes usually have much shorter seat tubes than those found on road bikes .

To get around the difficulty of measuring frame sizes, some brands use T-shirt sizing (e.g. S, M, L) for all their bikes, based principally on rider height.

But again, this measure isn’t consistent between brands. Indeed, brands that sell both road and mountain bikes may use a different sizing convention between the two.

Children’s bikes use different sizes again, often based either on a child’s age or the bike’s wheel size.

How to find your bike's size

If you have a current bike, you can look at the frame size sticker on it to find what size it is. This will often be located on the seat tube, but might be in a more discreet location, such as under the bottom-bracket area.

If it’s a recently sold model, you should be able to find a geometry chart for your frame on your bike brand’s website.

Alternatively, you can measure your frame size yourself, as we explain in this piece on how to measure a bike frame .

How do I know what size bike I need?

There are a number of ways to find your correct bike size.

1) Rider height and inside leg

The quickest is often to look on a brand’s site.

Usually, there will be a size chart with recommended bike sizes for different rider heights, so it’s comparatively easy to see where you fit.

Some brands will have an interactive size guide, where you input your height and often other details, such as inside leg length, to find your recommended size.

However, don't take a brand's size guide as gospel – it's a guide, after all, and one person's dimensions and requirements can vary from another, even if they are the same height.

Equally, if you are between sizes, you will need to decide whether to size up or size down. More on that to come.

2) Go to your local bike shop

Next up, if you’re buying a bike from a physical shop, you can ask them what size you need. Sometimes you’ll just get eyeballed and the assistant will put you on a bike to see if you fit.

However, bike shops are getting more sophisticated, so you might get a proper sizing where the shop staff will measure you and determine more precisely what size bike you need.

Find a good local bike shop that takes the time to ensure you’re buying the right size bike.

3) Bike fit

Finally, some shops will offer you a discounted or free bike fit as part of your purchase. This is the most sophisticated option, not just to make sure you get a frame that fits, but to have your contact points set correctly so you'll be comfortable and efficient when riding.

You may be advised to swap out components such as the stock saddle for something that better suits your sit bone anatomy or to opt for a non-standard bar width or stem length , for example.

A bike fit will also help you to determine key setup measurements, such as saddle height, which are crucial to finding a comfortable and efficient riding position. We’ll cover this in more detail later.

What if I'm between sizes?

There’s normally an overlap between frame sizes, so you’ll often have a choice of two sizes.

If you sit between two frame sizes, the normal advice is to take the smaller of the two options. There’s a lot you can adjust easily on bikes, such as saddle height and handlebar height , to fine-tune the fit.

However, seek further advice from the bike brand or your local shop, if you're unsure.

Bike size chart

We’ll cover the nuances of road bike, mountain bike, hybrid bike and gravel bike sizes shortly, but here’s an overview of typical frame sizes, according to rider height.

However, body dimensions and frame layouts can vary significantly from one person and brand to the next, so seek further advice, specific to the bike you are intending to buy, before purchasing.

Road bike size guide

The most common way of sizing road bikes is by seat tube length in centimetres.

However, this will be different depending on whether the frame has a sloping or a horizontal top tube, so you’ll often see 'effective' seat tube lengths quoted, based on a horizontal line between the head tube and the seatpost.

Some brands just give you S, M, L (and often XS and XL) sizes. Others, such as Colnago and Pinarello, have their own unique sizing systems.

That means you’ll need to revert to the brand’s size info, as described above, or study the road bike’s geometry chart to work out which bike size is best for you.

See our guide to road bike sizing for more detailed information.

Mountain bike size guide

When it comes to mountain bike sizing , most brands have reverted to an S, M, L (etc) sizing method for their frames.

With mountain bike seat tube lengths being highly dependent on the frame geometry and rear-suspension layout, T-shirt-style sizing provides the clearest guide.

The trend for long and slack mountain bike geometry has accentuated the difficulty in selecting a frame size based on seat tube length alone and some brands now rely on reach (the horizontal distance from the centre of the bottom bracket to the top of the head tube) to define their frame sizes.

Seat tube length is still an important consideration though, because you need to be able to get your saddle height right. If you want to fit a dropper post , a short seat tube may also mean some models won't fit.

Finally, MTB frame sizes are significantly smaller than for road bikes, so don’t try to compare your road bike and mountain bike sizing.

We’ve got a lot more info in our mountain bike sizing guide.

Mountain bike sizing, geometry and riding style

It’s a good idea to study our guide to mountain bike geometry to understand the key measurements of an MTB frame, and how they affect a bike’s handling characteristics and fit.

The type of riding your bike is designed for alters its geometry, too. If you’re riding a cross-country bike , designed for agile handling, you may want to be more stretched out, while beginners may prefer a shorter reach so that they’re more upright, with less strain placed on the hands and wrists.

Bikes designed for more aggressive riding, including the latest downcountry bikes , trail bikes and enduro bikes , will typically have a longer, slacker geometry to match, which may have a knock-on impact on finding the correct frame size.

With the trend for bikes to have slacker head tube angles, it’s important to get your position forward enough to weight the front wheel and the suspension effectively, so you don’t want a frame and seat position that sits you too far back. Again, a geometry chart is the best way to work out the best frame size for a comfortable fit.

Gravel bike size guide

Gravel bike sizing is much like road bike sizing, with most brands using the seat tube length in centimetres to size frames, though T-shirt-style sizing is, once again, also used by some brands.

In general, your position on a gravel bike will be more relaxed and upright than on a road race bike.

That’s because you need to be able to shift your weight around more off-road to balance and steer your bike over obstacles. A more upright position will also be more comfortable over uneven terrain.

Having said that, if you’re interested in gravel racing , a longer and lower position will reduce your frontal profile and potentially make you faster, and the geometry of many of the latest go-fast gravel bikes is shaped accordingly.

As when choosing a road bike, pay attention to the geometry of a gravel bike when choosing your next ride. Buying a bike that matches your riding intentions is vital.

Women’s bike size guide

Women's frame sizes can vary significantly depending on a brand's outlook on women's bikes.

Some brands, such as Liv, have women’s-specific geometry and women’s bike ranges designed from the ground up. As a result, the range of sizes on offer will also be specific to women.

Other brands, meanwhile, assert that there are more differences in body proportions among people of the same sex than there are between sexes, and label all their bikes as unisex as a result, following a 'unisex' size guide.

In the middle, you have brands that offer 'unisex' frames but with specification tweaks to cater for women.

Some brands – such as Canyon, on its women's-specced WMN road bikes – fit smaller 650b wheels to their smaller frame sizes, so that geometry and handling can be kept consistent through the range.

We’ve got a separate guide to women’s bike sizing to cover the topic in detail, including the difference between road, mountain and hybrid bike sizes for women.

Kids’ bike size guide

As with adult bikes, it’s vital to get the size correct for a child's bike.

Age range is often quoted by bike brands as a way to size kids’ bikes but, because children grow at different rates, it’s not the best way to make sure a bike will fit comfortably.

Measuring your child

Measuring your child is an important first step in choosing the right kids’ bike size.

That starts off with their inside leg measurement. You also need to measure their height.

For the majority of the best kids’ bikes , that should give you the info you need to hone in on the correct bike size.

Wheel sizes

As we cover in our kids’ bike size guide , children’s bikes are normally sold by wheel size (in inches), with sizes increasing from 12-inch balance bikes, via 14in, 16in, 20in, 24in and 26in.

What if a child is in between sizes?

It’s tempting to buy a size up so that they’ll grow into it in a few months. That’s not optimal, not least if you're teaching a child to ride a bike for the first time.

If they’re not able to ride the bike comfortably and put a foot down easily, they may feel nervous, lose confidence, and be put off riding. It’s also easier for a child to overbalance and have a fall if the bike is too large for them.

Some brands have trade-up schemes with a discount on a larger bike when they’ve grown out of their current one.

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6' tall & 56cm bike?

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Hi everyone. Are there any 6 foot riders who perfer 56cm frames? The reason why I ask is I have a 32.5" inseam, and all the stuff I read says I would fit a 56cm frame? However alot of new bikes you see for sale say a 6 foot tall person fits 58cm frame? And no I'm not going down to my LBS, because I dont wont to waste their time fiting me for a bike, that I'm not going to buy from them. I'm leaning towards buying a racing frame if that helps. All help is welcome....  

I ride a 54cm and I wear 34-36" inseam pants but I have a short body, leg length is only half the story  

You can always make a bike bigger (longer stem, taller seatpost) than smaller - so if you are on the border of sizes, it is often better to go with the smaller frame. But you cannot generalize frame sizes. I'm 5'10" and this is what I learned while looking for a bike: I ride a 56 cm on a C-dale and Felt, a 58 cm on a Trek, a 55 cm on a Lemond and a 54 cm on a Specialized. I ride a large on Giant but a medium on a Scott. They all fit me differently. I know it is a pain to go to an LBS when you know you aren't going to buy anything from them, but that is about the only way to know for sure.  

You both bring up some valid points, on different fits for different bikes. My personal preference is to be able to "over-power" the bike, and have good control of it. I am looking at the Specilazed Allez at the moment. It is really hard to look at bikes, as my opinions seem to change from day-to-day. Sometimes I'm thinking I'll go old-school, then others I'm thinking slightly used, then I'm thinking something new. However when it comes down to it, price is the limiting factor, and the 400 dollar range cuts alot of quality out in the new bike department. Thanks for your help, and others please put in your 2-cents worth too.  

Frame sizes vary. So do 6' tall riders. Some manufacturers measure their frames center-to-center, some center-to-top. And in the case of the latter, you have to ask: top of what? Top tube? Seat post extension? I'm 6' tall but slightly long of leg, and my bike measures 58cm center-to-center. That's at least a 59cm measured center-to-top, and its arguably a tad too small for me vertically. But the 58cm top tube coupled with a 110 stem is just right. Your reluctance to take advantage of an LBS you don't intend to give your business is commendable, but unfortunately that's a dilemma for which I have no easy answer ... unless it's to buy your first bike(s) from an LBS until you're certain about your fit issues and then perhaps move on to online vendors later. A good LBS -- admittedly, they can be hard to find -- can be a tremendous asset, especially to someone just starting out. In the same way that it's not just about the bike, neither is it just about the bottom line on the invoice. Another option would be to find a shop or fitter that will figure out the proper bike size and fit for you, for a fee.  

Try a compact style frame. i'm 6' 0.5" and have a 34" inseam, I have Giant TCRs in both Large and Medium. While some people don't like the compact style frame, its super natural for me as a mountain biker.  

I'm 6'0" tall and ride a 56 cm x 56 cm 'traditional' geometry bike. Running a 0 degree stem and no-setback seatpost makes it a close, 'race' fit, but I like it a lot. Some calculators say it's just a bit too small for me set up this way, but on seeing me ride it my coach thinks it's where it needs to be, and I do too.  

KendleFox said: Hi everyone. Are there any 6 foot riders who perfer 56cm frames? The reason why I ask is I have a 32.5" inseam, and all the stuff I read says I would fit a 56cm frame? However alot of new bikes you see for sale say a 6 foot tall person fits 58cm frame? And no I'm not going down to my LBS, because I dont wont to waste their time fiting me for a bike, that I'm not going to buy from them. I'm leaning towards buying a racing frame if that helps. All help is welcome.... Click to expand...

I'm 6 foot tall with a 33.9 inch inseam. I ride a frame with a 56 (c-c) seat tube and a 56.5 top tube. I think it fits me well. I had a professional fitting done once and was told that my optimal frame size would be a frame 56-57 (c-c) vertically with a 55 cm top tube. Not too many around with those dimensions. I guess I'm all legs and short upper body.  

Blue Sugar said: You should look into a compact frame like the steel/carbon, alum/carbon LeMonds. They have short standover and long top tubes that would probably fit you well. They're also excellent frames. If you have the dough you could have a custom frame built up for you. Click to expand...

The best advice I can give is to forget everything you've read or heard about fit in general and remember you are buying one bike for one individual - you. There are no general rules and formulas that are right for everybody. You need to find a bike that fits you; both in terms of your body size and riding style and you want a frame that fits, not one that needs stems or seatposts to compensate for problems. To do that properly, either you must acquire the knowledge and experience to know what is right for you, or pay someone who already has that knowledge to help you.  

I'm 6'0", about the same leg measurements as OP, and all my bikes have 56cm toptubes. I use either a 110 or 120mm stem depending on how much reach I want to have. All of my road bikes have nonsloping tob tubes. My Kestrel TT bike is a 55 and I only use a 90mm stem on the areo bars.  

cdhbrad said: I use either a 110 or 120mm stem depending on how much reach I want to have. All of my road bikes have nonsloping tob tubes. My Kestrel TT bike is a 55 and I only use a 90mm stem on the areo bars. Click to expand...

It depends on a number of factors, but... First off, seat tube length is actually not the optimal way to measure a bike. Top tube length is actually much more important for finding a comfortable position. That said, how long/big of a bike you want will depend on your preferred riding position. If you plan on riding low (more bent forward), than you want a slightly smaller frame, both because you can get your handlebars lower but also because the more upright you sit, the more your arms swing forward. Personally, I would suggest a slightly bigger frame, rather than smaller. For comparison, I'm 5'11" with a fairly "normal" leg to torso ratio, and I ride a "59cm" bike---58cm C-C seat tube, 57.5 C-C top tube, and a 110mm stem. For a more "proper" road position (read, racer position), you want to be able to stretch out your back and flatten it. It'll take a little getting used to, but once you do you'll be more comfortable and perform better. Keep this in mind. But really, the only way your going to know what size to get is to go to the store and do some test rides.  

For a sloping top tube, you reference the "virtual" length, as opposed to the "actual" length of the top tube. This way, you can compare traditional vs. sloping geometry frames. Most makers with sloping geometry will give both actual and virtual tt measurements.  

56 cm I am just under 6' with a 32.5 inseam. I just purchased a Specialized Roubaix with a 56.5 cm top tube, 120 mm stem. I think it fits just right.  

There's more to your LBS than buying a new bike from them! This is the place to contact other riders, organize rides, get involved in the bicycling community. Besides bikes, you're going to need tires, tubes, clothes, accessories. While all these items are available online, the LBS allows you to "kick tires" and physically inspect and compare items. As for finding a bike in your price range. Your LBS should be happy to help you figure out your "fit" and probably put you in touch with riders who have a used bike for you. If your LBS is serious about cycling, they realize that you're not a "single sale" client, but rather a long-term customer who will come to rely on the LBS for a wide variety of cycling needs. If your LBS is putting you off because you don't have $2,000 to put into a high-end race machine, then maybe you need to shop for a different LBS. A reputable LBS will be interested in getting you into the "right" bike for YOU, and then supporting your interest with its connections to the local cycling community. MY LBS -- Bikes & Beyond, Astoria Oregon -- has a couch on the sales floor, and a coffee table full of bike mags, ride info. They expect and encourage riders to park the bike inside the shop, behind the couch . . . take off the cycling shoes, read up, visit, compare stuff, try on new clothing, accessories. They have a bulletin board for used bike sales, accessories, rides, races, etc. If you don't feel "at home" in your LBS, and comfortable having them help you find a bike, then maybe you need to shop for another LBS. My $00.02 . . . *G*  

6'1'' 56cm toptube c-c (standard geometry) I'm 6'1" with a short torso. So for me, it was more of the top tube that was more important than height clearance. I used to ride a 58 tt (c-c) Cannondale for 6years. When I bought it from the LBS, they said that it was the frame size for my height. I didn't know any better so I bit. When I had myself properly sized by another LBS years later, they pointed out my short torso and I should be riding a top-tube lenght between 55.5cm-56.6cm. Now, I ride the following bikes: Wilier Triestina Lavaredo = 54.5 top tube (for crits) Orbea Zona = "Short 56" - 56 geometry with 55 sloping top tube (virtual top tube =56.5) Somec Starlight = 56 top tube traditional geometry. All my bikes have pretty much the same stem length (110) and seatpost setbacks. Ride Safely, Joe  

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