trek fuel frame

• Fuel EX C Gen 6 Frameset

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Pinkbike's 2022 Mountain Bike of the Year

"This is a bike that could be used to head out for a big meandering backcountry adventure one day, roll up to the starting line in a local enduro race the next, or even head into the bike park for a lap or three without missing a beat."

Editor's Choice: Best Mid-Travel Trail Bike

"The burliest, most versatile, and most capable Fuel yet; truly up for whatever you want to ride [...] The updated geometry sits comfortably amongst today's best trail bikes [...] Absolutely shreds right out of the box."

"Our favorite Trek"

"Fuel EX proved itself a happy climber. From slabs to roots and square-edge hits, the Fuel EX handled it masterfully. A damn fine trail bike right out of the box, no matter your riding style."

"Fuel EX is a masterpiece"

"Fuel EX absolutely devours chunky terrain while still retaining the ability to tractor up steep climbs. I have become convinced that a bike with long, stable geometry and mid-level travel really can provide the best of both worlds."

Editor's Choice

"The term ‘quiver killer’ may be old and tired, but there’s nothing old-fashioned about a versatile mountain bike that can handle nearly any terrain [...] Riding the Fuel EX this summer was a treat!"

"Loves to ride fast, both up and down"

"Fuel EX is a highly adaptable bike that feels comfortable in a really wide variety of terrain but doesn’t confuse itself for anything more or less. Bike riders, rejoice."

"Ready for anything"

"Fuel EX's geometry feels ready for just about anything. There's plenty of traction for climbing and a nice fluttery feel on descents, calmly smothing out the trail chatter."

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2023 Trek Fuel EX 9.9 XX1 AXS review: A widely capable trail bike with a high-end build

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I’ll admit, climbing is not my favourite part of a ride, but when you get a bike that climbs like Trek’s new Fuel EX, cranking uphill gets a lot more enjoyable! The 2023 Fuel EX will serve as Trek’s mid-travel do-everything trail bike, and it offers a near perfect ‘quiver-killer’ package with its aggressive climbing ability, slack steering angle and 140/150mm travel. Add adjustable geometry and shock progressivity to that, and you’ve got one versatile trail machine.

I picked up the Fuel EX 9.9 XX1 AXS during Crankworx Whistler, giving me a few weeks to get a handful of rides on it. Right away I can say the bike climbs like a hyperactive goat, but my area demands a bike that can descend well too. The Fuel EXs steering angle is slack enough for any trail, so the bike only finds its limit on really rough terrain that challenges its 140mms of rear travel.

2023 Trek Fuel EX – basic specs:

In this article we’ll discuss how the new Fuel EX rides. Here’s few basic specs, but check out my launch post for all the details on the new Fuel EX’s features, geometry and build kit options.

The Fuel EX frames are offered in both aluminum or carbon, with 140mm rear travel and a 150mm fork (except the entry level EX 5 which carries over the outgoing frame with 130mm travel). Most sizes ride on 29” wheels, but the XS frames run 27.5” only and the smalls offer the option of 27.5” or 29”. The 29ers can be converted to mullet setups, but Trek recommends adding a 160mm fork.

Between Trek’s Mino Link chip and optional angle adjust headset cups for the Fuel EX, there’s plenty of variation in frame geometry depending on settings. Some angles and measurements change with frame size as well, particularly the rear end lengths which are now size-specific.

To summarize it quickly, the Fuel EX’s head tube angle can range from 63.5° to 66° with the optional cups in play. Without the cups, the Mino Link gives you the choice of 64.5 or 65°. Seat masts are pretty steep at 76 to 78.9° across all sizes/settings.

Trek stretched out some pretty lengthy reaches on the Fuel EXs; The M/L bike I’m testing measures 470mm. Out back, Trek leaned towards the middle with their new size-specific chainstay lengths. The M/L frame I rode has 440mm stays, which are not short but not long either.

The top-of-the-line Fuel EX 9.9 XX1 AX S weighs 32.76lbs (with pedals).

Ride Impressions: Suspension

I am quite familiar with Trek’s suspension, as I’ve owned a Remedy for the last few years. I wasn’t surprised to find the Fuel EX climbs even better, and offers about 95% of the Remedy’s downhill prowess.

Trek’s ABP linkage is a very supportive climber, especially with the rear shock in its firm position. With the shock’s help, the rear end firms up enough that the rear wheel starts floating over pockets between roots and rocks, rather than diving into them. You’ll still use about 50% of the rear travel on singletrack trails in firm mode, so I still find traction is ample and the ride remains fairly comfortable.

What’s great is how the Fuel EX is a solid climber without any help from the shock too. Climbing technical singletrack in open mode, I only dipped into 2-3mms more travel than climbing in firm mode. The ride does get a bit more forgiving and slightly more grippy in open mode (without losing much efficiency), so it’s a practical option for rougher ascents.

Somehow, despite how supportive the Fuel EX’s ABP linkage is going uphill, it’s a whole different beast going down. It’s as if the linkage is speed-sensitive, as it responds very well to all kinds of high-speed impacts and has an impressive ability to round off sharp hits. Whether it’s small chatter or a full-on rock garden, the Fuel EX smooths out the trail very nicely. The rear wheel always feels well planted, and the linkage gives the bike a plowy feel through rough terrain. I do find Trek’s bikes aren’t super poppy on jumps, but they do have ample mid-stroke support to pump well through rollers and berms.

I have some delightfully rough trails in my area of B.C. and I did find moments where more than 140mm travel would have been ideal! That said, I don’t think you could do much better with 140mms of suspension than the Fuel EX has. While it’s really the slack steering that allows this bike to tackle pretty serious terrain, the adjustable shock rate also raises this bike’s tolerance for fast, rough riding.

I had no trouble getting full travel from the bike in its more linear LESS mode, and being a lightweight rider this is the mode I’d keep the bike in. It was perfectly dialed – I was enjoying full travel on descents but not frequently thrashing the bike with harsh bottom-outs.

When I flipped the chip into MORE mode, it did make a noticeable difference to the ride, but didn’t have much effect on how much travel I was using. I expected the bike to feel stiffer than preferred and that I’d need a good hard hit to bottom out the bike with the added progression. Instead I wound up using all the bike’s travel on any typical descent, although there was a palpable difference in how the bike felt. I could tell the linkage was resisting hard, fast impacts more than before, so I’d bet fans of coil shocks, or heavier and more aggressive riders would appreciate the difference the chip makes. In my case, it just made the ride a bit firmer than it needed to be. If I was a competitive racer I’d probably prefer MORE mode, but I ride recreationally so I keep things on the soft side!

Fit-wise, the first thing I noticed about the Fuel EX is its generous reach. At 470mm on the M/L frame, it’s about the longest bike I’ve ridden yet. This nearly straightens my arms, so I don’t think I’d want to go any longer, but it did feel roomy and comfortable on the trails. Of course the steep 77.5 degree seat mast leans you over that lengthy front end, so you wind up well centered between the wheels.

I liked the 440mm chainstay length on the M/L Fuel EX. It’s not so long that the bike feels like an enduro sled, but it is long enough to provide a stable ride and great climbing traction on steep uphill sections.

I am also a fan of slack steering angles. I didn’t have the optional headset cups for the Fuel EX so I couldn’t go to 63.5°, but my demo bike was set up at 64.5°. That’s a great number for rowdy trails, and definitely allows this mid-travel bike to take on enduro-level terrain. I have not found running a slack steering angle causes any real penalty on climbs, so I’m happy with a slack trail bike.

The Fuel EX comes with the Mino link in Low position, which is definitely the preferred setting for my local terrain. The BB does ride pretty low in this position at 335mm, but I must be getting used to low BB’s because I didn’t have any problem with pedal strikes on this bike.

Standover height on the Fuel EX is not particularly low, but not problematic for me. If I wound up near the head tube I could damage some sensitive bits, but in front of the saddle there’s ample clearance for standing comfortably.

On-Bike Tools and Storage:

In recent years, Trek has jumped on board with on-bike storage and tools. The Fuel EX, in either aluminum or carbon, offers a frame storage compartment in the down tube. The included Bontrager BITS tool roll is designed to hold a tube, co2 canisters, an inflator head and tire levers.

The high-end Fuel EX 9.9s also come with tools in the steerer tube. The Bontrager tool offers a chainbreaker, and a removable multi-tool with seven allen keys, a torx and a flathead screwdriver bit.

Components:

The Fuel EX 9.9 XX1 AXS boasts a pretty top-of-the-line build kit, and gave me my first experience with SRAM’s AXS electronic drivetrain. I really like the feel and ergonomics of SRAM’s dropper post and shifter remotes, as the light push-button action is undeniably easier than throwing paddles on a traditional cable shifter. Performance-wise, the AXS drivetrain was great but not perfect – about once on every ride I’d get a bit of a hesitation when shifting (not always the same gear), and once the derailleur harshly jumped back into a gear after I rode a rough downhill section. Otherwise, the shifting was quick and precise, so for my short test I didn’t attempt to reconfigure the shifting. I had no real mechanical issues with any of the AXS components on my rides.

Aside from the XX1 AXS drivetrain I’d say it’s the one-piece handlebar/stem that gives the top-tier Fuel EX a really high performance look. The Bontrager RSL bar/stem offers a 27.5mm rise, 820mm stock width, and a 45mm stem length with zero rise.

SRAM’s Code RSC brakes offered ample power for any descent, but I was a bit surprised to feel how much squeeze they required to get full braking force. Of course, their modulation is great but compared to the TRP DH-R EVO’s I’ve been riding the Code RSC’s required more effort to almost lock up a wheel.

When I picked up the Fuel EX Trek’s people had it all set up for me, and I didn’t have to touch any adjustments on the fork or rear shock throughout my testing. Not surprisingly, the top-notch Fox Factory 36 EVOL fork with its Grip 2 damper left me nothing to complain about, as did the Fox Factory Float X rear shock.

Bontrager’s Line Pro 30 carbon wheelset offered that pleasant, slightly damped feeling carbon rims can provide, and survived my testing with no damage to speak of. The Bontrager SE5 Team Issue tires don’t match Maxxis’ Minions or Assegais in terms of overall grip, but they’re still fairly good for traction and they’re a fast rolling tire. To make sure you can get those wheels moving over anything, the Fuel EX 9.9 XX1 AXS comes with a small 30t front chainring and a 10-52t rear cassette.

I had no comfort issues with the Bontrager Arvada saddle, and no other mechanical concerns with any other components.

I’ve described how well the Trek is set up for all-around trail riding, but one thing I really appreciate is the relatively low weight of the Fuel EX 9.9 XX1 AXS. I’m a small guy, so I find lighter bikes a pleasure to climb, as they’re easy to heave up over bumps and power up steep sections. I’d bet Trek could have gone even lighter, but probably not with all the functionality plus the bells and whistles this bike includes.

The Fuel EX 9.9 XX1 AXS retails for $10,749.99 .

Want more tech info on the new Trek Fuel EX? Check out our in-depth post here . 

trekbikes.com

Steve Fisher is a staff contributor for Bikerumor. Steve has been writing about trail, enduro and downhill mountain biking (plus a few commuter bikes) for seven years. Prior to that, Steve wrote for Whistler Traveller Magazine and Mountain Life Magazine. Steve is based in Pemberton, British Columbia, an area that offers plenty of challenging world-class singletrack and makes for great photos!

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I rode a lower end version of this bike ( 9.7?) earlier this year in Moab, and I was equally impressed. I called it a hero bike because I rode like I’ve never ridden before – my grey haired friends amazed to see me going off 5+ foot drops and riding past them when they got off to walk ( both up and down!).

The yellow is absolutely terrible. It looks like a GT. Seems like a great bike nothing but positive things to say. Good job Trek

I hope this signals a reduction the “TREK” logo size across their bike line-up. Some of the high end trek road bike have embarrassingly large logos.

32+ lbs for the very top spec seems a little heavy? Otherwise it sounds like a great trail bike.

The Fuel EX 8 (aluminium frame) has put on 1.8 kg, which seems crazy.

Nice review, Steve. While you’re at one end of the travel needs spectrum, I’m at the other, trying to figure out whether I really need a bike with this much travel.

Love the yellow. So tired of Boring Black…..

Looks like Trek outsourced frame design to Astro. A definite step backwards in aesthetics. Hopefully the bike rides much better than how awful it looks.

I am definitely out of touch with today’s standards of what’s light and what climbs well

Have Trek given up on the through shaft damper? I have an 2018 Fuel Ex which I love, wondering if it’s now obsolete.

I hope they have

I noticed that they shortened the crank arms on the larger sizes to 170mm

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The NEW 2023 Trek Fuel EX Gen 6

Trek Fuel EX release date: September 8, 2022

What type of mountain bike is the Trek Fuel EX?

The new Trek Fuel EX Gen 6 shows off what a modern trail bike should be. New features including longer travel and impressive on-the-fly adjustability serve riders that have a soft spot for the steep stuff. The size-specific build is customized to the rider and added features make you feel one with the mountain. As trail riding evolves, achieving the perfect fit and ideal suspension settings have never been so close at hand. There's nothing you can't ride with the Fuel EX.

• Wheel size: 29" (S-XXL) or 27.5" (XS-S)
• Front travel: 150mm
• Rear travel: 140mm
• Tire clearance: 2.5"
• Size range: XS - XXL
• Frame: Carbon or alloy
• Colors: Deep Smoke, Mulsanne Blue, Satin Baja Yellow, Crimson, Matte Pennyflake

Want to get the scoop on inventory?

Chat with us about availability

Or keep scrolling to compare and contrast each model.

Fuel EX Overview Fuel EX Video --> Fuel EX Features Fuel EX Geometry Fuel EX Size Chart Fuel EX Models Fuel EX FAQs

Who’s it for?

The updated Gen 6 model is for riders who love all trails, flowy, rocky, steep, loose, and otherwise. It's for the renaissance rider who rides it all.

The adjustable geometry and suspension flip chip appeal to mountain bikers who prioritize tuning their setup to the current conditions. 

The Fuel EX is the longer-travel sibling of the snappy Trek Top Fuel designed for lighter, more XC style trails.

Why you'll love it

The Fuel EX is in a league of its own when it comes to on-the-go adjustability. 

Riders can now easily customize their geometry and suspension progression at the flip of a chip and optimize their ride no matter the trail. 

You’ll enjoy full days of downhill shuttle runs more than ever thanks to the redesigned frame, downtube guard, and handy internal storage.

Click to watch the Fuel EX video

What's new on the 2023 Trek Fuel EX?

Check out the Trek Fuel EX overview below and learn about all its exciting updates.

More front and rear travel

Year after year, riders continue to push the limits of trail bikes and the Fuel EX Gen 6 delivers longer travel suspension for dominating steeper terrain. 

Front travel increases from 130mm to 140mm and the rear shock provides 150mm of cushion, up from 140mm on the previous model.

Adjustable Geometry

The 2023 Fuel EX also introduces an innovative adjustable headset that can alter the head tube angle by +/- 1 degree depending on the desired slackness. 

The head tube angle can be set between 63.5 and 65.5 degrees. 

The angle adjust cups combine with the Mino Link for a total of 6 possible geometry configurations.

Size specific builds

Trek has matched the frame sizes with appropriate wheel choices and chainstay lengths to ensure all riders achieve an ideal fit. 

XS models run nimble 27.5” wheels whereas frame sizes medium and up have 29ers. Small frames are available in both wheel options. 

All riders, regardless of their height, can find a bike that provides maximum control and handling.

New frame features

The reimagined frame boasts trendy tech, including a full length downtube guard for protection from debris and tailgates during shuttle runs. 

The new threaded BB and guided internal routing keep everything neatly tucked away and low-maintenance. 

The larger 34.6mm seat tube accommodates sturdier dropper posts and now all frames— carbon and alloy— come with handy downtube storage .

Adjustable suspension progression

Riders can effortlessly switch between suspension settings via a flip chip on the lower shock mount. 

Choose between the plush, less progressive setting for better trail feedback or the more progressive setting that’s better for aggressive riding. 

The progressive option avoids bottoming-out and performs great with linear coil shocks if you choose to upgrade later on.

Trek Fuel EX Geometry

The new Fuel EX features a steeper seat angle and longer reach for more efficient climbing and improved handling on demanding descents. 

This more aggressive geometry can be further fine-tuned from inside the headset with angle adjust cups (sold separately) as well as the rear triangle Mino Link, r esulting in 6 different geo configurations .

Trek Fuel EX Size Chart

Trek outfitted each frame option with the correct wheel size to optimize handling. XS models come with 27.5” wheels, frames M and up run 29ers. People who ride S frames are often caught in the middle, so those frames are available with both wheel options.

*Size XXL available in alloy only.

2023 Trek Fuel EX For Sale

Shop all our Trek Fuel EX models

Or compare and contrast them at a glance below:

Fuel EX 9.9 XX1 AXS

Frame : Carbon

Fork : FOX Factory 36

Shock : Fox Performance Float X

Drivetrain : SRAM XX1 Eagle AXS

Brakes : SRAM Code RSC

Wheels : Bontrager Line Pro 30

Price : $10,749

Fuel EX 9.9 XTR

Fork : Fox Factory 36

Drivetrain : Shimano XTR M9100

Brakes : Shimano XTR M9120

Price : $9,749

Fuel EX 9.8 GX AXS

Fork : Fox Performance 36

Drivetrain : SRAM GX Eagle AXS

Brakes : SRAM Code R

Wheels : Bontrager Line Elite 30

Price : $7,699

Fuel EX 9.8 XT

Drivetrain : Shimano XT M8100

Brakes : Shimano XT M8120

Price : $6,249

Fuel EX 9.7 SLX/XT

Fork : Fox Rhythm 36

Brakes : Shimano M6120

Wheels : Bontrager Line Comp 30 

Price : $4,699

Fuel EX 8 XT

Frame : Aluminum

Wheels : Bontrager Line Comp 30

Price : $4,299

Fuel EX 7 Deore/XT

Fork : RockShox 35 Gold RL

Shock : Fox Performance Float EVOL

Brakes : Shimano MT420

Price : $3,699

Trek Fuel EX FAQs

Is the trek fuel ex a trail bike.

Yes, the 140/150mm full-suspension setup and large wheels are best suited for trail riding all over the mountain, from the big climbs, flowy traverses, and steep descents.

How does the adjustable headset work?

Riders can swap out the standard headset cup for special angle adjust cups that alter the head tube angle by +/- 1 degree, either adding slack or increasing steepness. The upper cup can be dropped in whereas the lower cup needs to be installed using a headset press.

How much does a Trek Fuel EX weigh?

Depending on the model, a size M Trek Fuel EX weighs between 31.6 lbs and 35.21 lbs.

Do all Fuel EX frames use the same wheel size?

No, XS frames use 27.5” wheels and sizes M and up use 29” wheels. S frames are available in both wheelsets.

Is the Trek Fuel EX tubeless compatible?

Yes, all models from Fuel EX 7 and up come ready for a tubeless setup and include valves, sealant, and appropriate tires.

What is the Fuel EX’s tire clearance?

Both the 27.5 and 29 models have room for 2.5” tires.

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Field Test: Trek Fuel EX - Evolution Underlined

Cool Features

FIRST RIDE REVIEW

The new trek fuel ex review.

Photos & Words by Dario DiGiulio

As mountain biking has evolved into what it is today, the trails we ride on have slowly but surely raised the bar of what modern bikes have to keep up with. Sure, some tracks have been sanitized over time, but there’s no question that the pointy end of the sport has kept pushing forward. As a result, trail bikes have had to pick up the pace to match the expectations of the average rider, leading to more capable and confident rigs with every new model. Stepping up to the plate, we have the evolved version of the Trek Fuel EX, Trek’s mainstay trail bike. This time it’s really meant to do it all, riding anywhere and doing anything. Being this adaptable can be a tricky task though, so has Trek painted themselves into a corner?

The new Trek Fuel EX breaks just about every mold that the prior generations had fit into, with a full-on redesign for the new model. The name of the game here is adaptability, whether in the geometry, the suspension kinematics, or even what size wheels you’ll run. Thanks to their Mino Link flip chip and two sets of press-in headset cups, you can shift the character of this bike drastically to suit your terrain and preference. As a result, it’s a bit hard to parse out the specific geometry of the bike (however Trek’s site features a geometry tool to let you do so), so I’ll just speak to it in its most neutral form, which is where many will likely settle. There are a whopping 8 size variations to this bike from XS to XXL, so it’s worth digging through the geometry tables to see which might suit you best. They’re all sporting 140mm of rear travel with a 150mm fork, upping the numbers on the prior generation by 10mm.

I’ve been testing the large frame, which puts the reach and stack at around 485mm and 621mm, which are in line with the majority of the industry right now. In keeping with the new Trek Fuel EX’s theme of being adaptable and capable. In its neutral-low setting, the bike comes with a 64.5-degree head tube angle and the effective seat tube angle sits at 77.2-degrees. Chainstays shift with the frame size, and on a large come in at 440mm. Thanks to the Mino Link flip chip, you can adjust bottom bracket height by 8mm up from the slammed 38mm drop in stock configuration, with a 0.6° steeper head tube and seat tube angle. The more significant head tube adjustment comes from the independent press-in headset cups that Trek supplies, which can steepen or slacken things by a full degree, giving a very wide range of handling characteristics. The last frame toggle is the progression flip chip, offering a simple more or less option to tailor the suspension feel and offer uncompromised coil shock compatibility.

As is trend right now, you can set the Fuel Ex up as a mullet, simply by popping a 27.5” wheel in the rear, swapping the Mino Link to high mode, and bumping up fork travel to 160mm. The bike comes stock as a 29er front and rear (or 27.5″ in XS and Small), so you’ll have to make this change on your own accord.

A notable thing lacking from the newest Fuel EX its the Knock Block – you’ll find no such thing on this frame. X-up fans take note, as this is a big move for the engineers in Waterloo, Wisconsin, and was necessary to achieve the headset adjustment range they wanted. Trek has also moved away from the RE:aktiv damper shock, now simply relying on an off-the-shelf model. Still included in the frames are the handy-dandy stash box in the down tube, with what I think might be the best weather sealing of any of the options on the market at this point, and a neat BITS tool roll.

Build kits come in as many flavors as the sizes, and the range of options is quite extensive, beginning at a respectable $3,699. I’ve been on the highest end build, the 9.9 AXS especial, coming in at a healthy $10,749. From Bontrager Line 30 carbon wheels, to the RSL one-piece carbon cockpit, to the XX1 drivetrain, just about everything is as nice as it gets, as you’d hope for this kind of money.

At my height of 6’3”, the geo combination of the Neutral-Low-More flip chip configuration on the large size makes for a really comfortable fit,  one that feels stable enough at speed while still remaining lively for your average trail. I started my time testing the bright yellow Trek up in Whistler, riding some gnarly rocky pedal-access trails around the Valley. This was a great context for deciding where I stood on the less or more progression debate, and I settled on the latter end of the spectrum. Increased bottom-out resistance and a more supple top of travel were worth a slightly punchier suspension feel, and I stand by that choice for most of the riding I have around me. On my home trails in Bellingham, the Fuel has been a choice companion for fast and fun rides in our local trail systems, where technical and engaging climbs lead to fast, rooty, and jump-filled descents. My general synopsis is that this is a bike that loves to ride fast, both up and down.

The climbing characteristics are comfortable and neutral, without wallowing too much or lacking grip in trickier terrain. Like many of the take-aways of the bike as it comes stock, things are extra-medium, in the best way. Compared to the new Hightower, the bike has slightly less support, but is significantly better in rough terrain and successive hits. Compared to the Stumpjumper EVO, the Fuel EX is definitely more of a trail bike, less of the all-mountain enduro-lite ride that the Specialized offers. All three bikes serve as a nice gradient from the lighter and sportier end of the trail spectrum to the burlier and more capable side of the category. Sitting pretty right in the middle is the Fuel EX, but I’m sure one could tweak it to either of the other extremes, given how much variability is baked into this frame.

Build kit notes are mostly positive, which you’d hope to see from the highest end build. My main gripe is with the Bontrager SE5 tires, which are some the least confidence-inspiring I’ve ridden in recent memory. The casing and tread pattern are fine, but the compound doesn’t seem to want to hook up anywhere, whether it’s dry loose terrain, rock slabs, and especially wet roots. This would be an immediate swap in my book, and I’d just keep the stock tires to run in the rear when conditions are dry and beat at the peak of summer.

The removable shuttle pad doesn’t seem to want to stay close to the frame, and bows out slightly when attached, giving the downtime a funny bulged look to it. One other frame annoyance has been a recurring suspension knock, despite chasing through every bolt in the linkage with a torque wrench. I still have yet to find the culprit, but luckily it’s not very noticeable when riding.

As a system, I’ve been more than impressed by Trek’s work on the new Fuel EX. Not only does it feel quick and confidant in the stock configuration, it also offers a whole host of layout options to better cater the bike to your preferences.

THE WOLF’S FIRST IMPRESSION

To close out our review of the new Trek Fuel Ex, it’s clear that Trek’s engineers and designers set out to design a bike that caters to that wide center of the market – the trail bike – where most riders spend their time, and where a bike can take many forms. In that goal, they found success. Sure some riders may feel the new Fuel EX has departed from what they were used to and liked about the bike, but many other riders will likely welcome the advancements in capability and confidence on the trail. The Fuel EX is a highly adaptable bike that feels comfortable in a really wide variety of terrain but doesn’t confuse itself for anything more or less. Bike riders, rejoice.

TREK FUEL EX 7

Price: $3,699.99

Frame: Alpha Platinum Aluminum, internal storage | 140mm Fork: RockShox 35 Gold RL | 150mm Shock: Fox Performance Float EVOL

Drivetrain: Shimano SLX/XT Brakes: Shimano MT420 4-piston

Wheelset: Bontrager Line Comp 30, Rapid Drive 108

TREK FUEL EX 8

Price: $4,299

Frame: Alpha Platinum Aluminum, internal storage | 140mm Fork: Fox Rhythm 36 | 150mm Shock: Fox Performance Float X

Drivetrain: Shimano XT M8100 Brakes: Shimano Deore M6120

TREK FUEL EX 9.7

Price: $6,249.99

Frame: OLCV Mountain Carbon, internal storage | 140mm Fork: Fox Rhythm 36 | 150mm Shock: Fox Performance Float X

Drivetrain: Shimano SLX/XT Brakes: Shimano Deore M6120

TREK FUEL EX 9.8

GX AXS Price: $7,699.99 XT Price: $6,749.99

Frame: OLCV Mountain Carbon, internal storage | 140mm Fork: Fox Performance 36 | 150mm Shock: Fox Performance Float X

Wheelset: Bontrager Line Elite 30, OCLV Carbon, Rapid Drive 108

GX AXS BUILD Drivetrain: SRAM GX Eagle AXS Brakes: SRAM CODE R

XT BUILD Drivetrain: Shimano XT M8100 Brakes: Shimano XT M8120

TREK FUEL EX 9.9

XX1 AXS Price: $10,749.99 XTR Price: $9,749.99

Frame: OLCV Mountain Carbon, internal storage | 140mm Fork: Fox Factory 36 | 150mm Shock: Fox Factory Float X

Wheelset: Bontrager Line Pro 30, OCLV Carbon, Rapid Drive 108

XX1 AXS BUILD Drivetrain: SRAM XX1 Eagle AXS Brakes: SRAM CODE RSC

XT BUILD Drivetrain: Shimano XTR M9100 Brakes: Shimano XTR M9120

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2022 Trek Top Fuel Review | All-new frame & geometry, with a whole new attitude

The not-so-minor details, 2022 trek top fuel 9.8 xt.

https://www.trekbikes.com/

- Brilliant trail-ripping geometry - Active and supportive suspension - Masses of cornering grip & stability - Refined and practical frame design - Downtube storage is a welcome addition

- Dropper post is sluggish - Wheels are solid but quite heavy - Carbon bars are harsh - Heavier than many of its competitors

Flow reviews the 2022 Trek Top Fuel

The Trek Top Fuel has long been known as the American brand’s flagship full suspension XC race bike, purpose-built to to compete at the very highest level of the sport. In more recent years however, the Top Fuel has steered in a different direction. With the short-travel Supercaliber taking over duties for World Cup XCO racing, Trek has softened the Top Fuel’s serious, race-focused persona, adding travel and bulking it up in the process.

For 2022, the Trek Top Fuel makes its biggest move away from its XC racing roots. Equipped with a brand new frame, an updated suspension design and some thoroughly modern geometry, the Top Fuel aims to retain the pert pedalling performance of its predecessor while significantly boosting its all-round capability. So, has Trek succeeded?

Watch our video review of the new Trek Top Fuel here:

Along with the active ABP suspension design and chunky tyres, there’s an exceptional amount of grip and support on offer for a 120mm travel bike.

Trek Top Fuel overview

Despite being all-new, the Trek Top Fuel retains its position in between the Supercaliber (the 60mm travel XC race bike) and the Fuel EX (the 130mm travel trail bike).

It’s equipped with a 120mm travel fork just like its predecessor, but rear travel has actually lifted by 5mm up to 120mm. This increase has been achieved with a longer stroke shock (50mm vs 45mm), and Trek has also flipped the orientation of the trunnion-mount. The rocker link now drives the shock via two sealed cartridge bearings to improve sensitivity.

You’ll no longer find a dual remote lockout on the Top Fuel, which leads to a vastly cleaner bike with fewer cables occupying your view from the cockpit. Along with the bigger shock, slacker geometry and 2.4in wide tyres, it is without doubt the most trail-oriented Top Fuel we’ve seen yet.

To put it into context, that sees it move away from the likes of the Orbea Oiz TR and the Canyon Lux Trail , and more towards the direction of the Santa Cruz Tallboy and Pivot Trail 429 .

A new, burlier chassis

Though it looks pretty similar, the Trek Top Fuel frame is all-new for 2022. It’s not so much a radical overhaul, but rather a collection of many small refinements that add up to a more practical package.

The chassis is notably beefier than its predecessor, with the seat tube diameter swelling to the new-school 34.9mm size. As well as increasing frame stiffness, the fatter seat tube is also shorter, allowing it to swallow a modern long-stroke dropper post.

The downtube is also larger, and it now features the integrated storage design we’ve seen employed on the latest Fuel EX and Slash. A latch underneath the bottle cage removes the trap door, providing you access within. A neat tool roll is included with the bike so you can carry a spare tube, levers and CO2. You could also fit a lightweight jacket in there along with some snacks.

Trek has updated the Knock Block headset, increasing the available turning radius from 58° to 72°. This provides you with greater freedom of movement on the trail, but still prevents the handlebar controls from smashing into the top tube. If you’re not into it though, the Knock Block is removable.

Also nice to see is a threaded bottom bracket shell for ease of maintenance, and the rear ABP pivot can now be tightened with a cassette tool. Also new for the Top Fuel is guided internal cable routing – poke the cable in at one end, and it’ll pop out the other, no fishing required.

Trail-leaning geometry

The 2022 Trek Top Fuel has received a series of geometry updates over the outgoing model, bringing it up to speed with other boundary-pushers in this travel bracket. Here are the key numbers;

• Head tube angle: 66°
• Seat tube angle: 76°
• Reach: 420mm (S), 450mm (M), 465mm (M/L), 480mm (L), 500mm (XL)
• Rear centre length: 435mm
• BB drop: 36mm

Compared to the old Top Fuel, the head angle has kicked back by 1.5-degrees and the reach measurements have gone up by 10mm. The seat tube angle has also steepened by 1-degree to improve the climbing position, while the chainstay length and BB drop remain the same.

The Top Fuel still features a Mino Link, but it’s now located at the lower shock eyelet. Bikes will come setup from the factory in the Low position. Flipping that into High will lift the BB height by 7mm and steepen the angles by 0.4°.

You can get even rowdier by fitting a 130mm travel fork, which will kick the head angle back to a very-slack 65.6° in the Low position. And for those wanting to push the needle further, there’s clearance to run 2.5in tyres.

Trek Top Fuel price & specs

We’ll see four Trek Top Fuel models coming into Australia this year – two with alloy frames and two with carbon. All Top Fuel models feature the same geometry, suspension design and travel. They’re all equipped with 29in wheels, and there are five frame sizes available from Small through to X-Large (the XS size with 27.5in wheels won’t be available in Australia).

Pricing kicks off at $3,499 AUD for the Top Fuel 5 and goes up to $8,299 AUD for the Top Fuel 9.8 XT that we have on test here. Additionally, Trek will offer a 9.9 spec via the Project One bike builder program.

You can check out the specs and prices for all those models down at the bottom of the page. Right now we’ll be diving straight into our experience of testing this bike here; the Top Fuel 9.8 XT.

• Frame | OCLV Mountain Carbon Fibre, ABP Suspension Design, 120mm Travel
• Fork | RockShox SID Select+, Charger 2 RL Damper, 44mm Offset, 120mm Travel
• Shock | RockShox Deluxe Ultimate RCT, 185x50mm
• Wheels | Bontrager Line Elite 30, OCLV Carbon Rims, 29mm Inner Width
• Tyres | Bontrager XR4 Team Issue 2.4in Front & Rear
• Drivetrain | Shimano XT 1×12 w/XT 30T Crankset & 10-51T Cassette
• Brakes | Shimano XT 4-Piston w/Ice Tech Rotors
• Bar | Bontrager Line Pro, OCLV Carbon, 27.5mm Rise, Width: 750mm (S), 780mm (M-XL)
• Stem | Bontrager Line Pro, 45mm Length
• Seatpost | Bontrager Line Elite Dropper, 34.9mm Diameter, Travel: 100mm (S), 150mm (M-M/L), 170mm (L), 200mm (XL)
• Saddle | Bontrager Arvada, Austentite Rails
• Confirmed Weight | 12.88kg (Large, Tubeless)
• RRP | $8,299 AUD

This differs from some other brands that utilise a single frame, and simply up-fork and up-shock it to create a slightly longer travel bike (like the Specialized Epic EVO and Orbea Oiz TR). The Top Fuel is not one of those bikes.

Trek Top Fuel sizing & fit

We put the new Trek Top Fuel into the hands of our tester Ben, who owns the current Top Fuel and has also spent considerable time on the Fuel EX. At 181cm tall, Ben’s been riding a size Large across all three bikes.

The Top Fuel is well-proportioned out of the box. The 480mm reach is very long, but it’s balanced nicely with a 50mm stem and the 76° seat tube angle. The Bontrager saddle is totally inoffensive, and we haven’t needed to shunt it into an extreme position just to get it comfortable.

The 760mm wide riser bars are a great match for this bike, and while it may not be totally necessary for all riders, the 170mm stroke dropper post is fashionably long for such a short travel bike.

Suspension & tyre setup

With the anodised sag gradients on the fork and shock, suspension setup is made easy. Weighing 80kg loaded up, Ben’s been running 180psi in the rear shock (26% sag) 80psi in the fork (20% sag).

The factory rebound tune for both the RockShox SID fork and Deluxe shock is quite light, so each rebound dial was set a couple of clicks slower than halfway.

Tubeless rim strips and valves come pre-fitted to the Bontrager wheels, and Trek kindly includes two bottles of sealant with the bike, making tubeless setup the breeze it should be. Pressures were set at 20psi on the front and 22psi on the rear.

Trek Top Fuel weight

Given its swollen proportions, the new Trek Top Fuel has gotten heavier. With the tyres setup tubeless, our test bike came in at 12.88kg without pedals. To put that number into perspective, here’s how it compares to some similarly-priced XC and Trail bikes we’ve recently tested;

• Canyon Lux Trail CF 9 – 11.22kg
• Merida Ninety-Six 8000 – 11.63kg
• Scott Spark 910 – 12.43kg
• Specialized Stumpjumper Pro – 12.84kg
• Trek Top Fuel 9.8 XT – 12.88kg
• Giant Trance Advamced Pro 29 1 – 13.38kg

Trek claims a carbon Top Fuel frame weighs 2.7kg including the rear shock, which puts it on the heavier side of things for a 120mm travel bike. The alloy frame is purportedly a whole kilo heavier again, with a claimed weight of 3.74kg.

The Top Fuel’s rolling stock is also a significant contributor to its overall mass. The Bontrager Line Elite wheels are heavy at 2,071g for the pair (with tubeless strips and valves). Incidentally, these are exactly the same wheels that came on the Slash 9.9 X01 , which is a full-bore enduro race bike.

Trek has also plumped up the rubber. The previous Top Fuel featured semi-slick XR3 tyres, but the new bike is now spec’d with 2.4in wide XR4 Team Issue tyres. They’re not overly heavy at around 800g each, though they do offer significantly better grip across a broader range of conditions.

What does the Trek Top Fuel do well?

From the very first ride the new Trek Top Fuel proved to be easy to get used to, with no quirks to the fit, handling or suspension.

The proportions are significantly broader compared to the outgoing Top Fuel, with the front wheel sticking out much further ahead of the rider. Despite the long reach however, the effective top tube length is basically identical to its predecessor, so the overall cockpit length remains the same.

The steeper seat angle is noticeable though, providing an improved climbing position with your hips placed further over the bottom bracket. As a result, less bum-shuffling is required on stem-chewing ascents.

Pedalling performance is also superb. Despite its burlier exterior, Trek is still prioritising pedal efficiency with the Top Fuel, with the main pivot positioned high and quite far forward of the bottom bracket. Anti-squat is claimed to hover around the 100% mark, and indeed the rear suspension clenches tightly under chain torque, propelling the whole bike forward with minimal energy loss.

Active suspension performance

Despite the trunnion bearing mount and the longer shock stroke, the rear suspension doesn’t feel radically plusher than its predecessor, which already offered great performance. It is noticeably more supportive though, particularly when absorbing square-edge hits at speed, and when returning to earth after boosting off a lip on the trail.

It’s worth noting here that many bikes in the 100-130mm travel bracket make use of a carbon flex-stay design, including the Canyon Lux Trail, Merida Ninety-Six, and Specialized Stumpjumper. As well as being simpler, flex-stay designs are typically lighter too.

In comparison, the Top Fuel sticks with a genuine four-bar platform based around the ABP suspension design. Trek claims the ABP pivot helps to isolate braking forces from the suspension, and indeed it does result in less skipping and skidding when you’re on the brakes on loose, rocky descents.

With all the pivot points rolling on steel ball bearings, the suspension is more active and possesses a more consistent feel to both compression and rebound damping when compared to a flex-stay design. Yes it’s heavier, but the Top Fuel offers notably more active suspension performance, with excellent traction on loose climbs and better reactivity across chattery rock gardens. It’s very impressive for a 120mm travel bike.

Look out Fuel EX!

The geometry is also brilliant, and the handling really sets it apart from the outgoing Top Fuel.

Cornering performance has improved, with more grip courtesy of the longer front end and those XR4 tyres. These are great all-rounders, with a supple casing and surprisingly decent rolling speed given their size and tread pattern.

The new Top Fuel is also much more composed on rough and fast descents. Thanks to the longer reach and slacker head angle, the overall wheelbase length has grown by almost 40mm. That’s huge, and it offers a vastly more planted feel at speed. Along with the big tyres and active suspension, this really is a solid little trail bike.

In fact, the geometry updates kind of make the Fuel EX look a little outdated. The two bikes now share the same head angle, and the Top Fuel has a 10mm longer reach and a steeper seat angle. The front end is quite a bit higher on the Fuel EX though, and that does inspire more confidence on really steep descents.

As mentioned earlier though, it’s possible to fit a 130mm fork to the Top Fuel, which would lift the front end and actually make it slacker than the Fuel EX. Indeed there’s now quite a bit of overlap between the two platforms, leaving us to ponder what could be in store for the next generation Fuel EX.

What does it struggle with?

You’ve likely gathered that the new Trek Top Fuel is more of a muscly trail ripper than a spindly XC featherweight. While it may carry over the name, it’s evolved into quite a different bike compared to its racier ancestors.

The lack of a remote lockout results in a much cleaner cockpit, and we like how it signals the Top Fuel’s commitment to its trail riding intentions. However, it may disappoint those riders and racers who prefer having an instantaneous sprint button at their fingertips.

Indeed with all the updates, and the fact that the new Top Fuel has double the travel of the Supercaliber, there is now an even bigger gap between these two bikes. Riders who are still interested in some part-time XC racing, but aren’t sold on the Supercaliber’s sharp geometry and proprietary IsoStrut suspension design, may be turned off by the Top Fuel’s new attitude.

Of course you could easily inject some speed with some lighter and faster-rolling tyres, like Bontrager’s XR2. There’s also around half a kilo to be saved in the wheelset, which would make a significant difference to the Top Fuel’s acceleration and climbing enthusiasm.

You could also flip the Mino Link into the High position to steepen the angles. In that guise, with lighter wheels and faster tyres, the Top Fuel would make for a comfortable and confidence-inspiring option for those wanting to sign up for the odd endurance race or multi-day event. If you’re serious about your XC racing though, this is not the bike for you – you’ll be wanting to look at the stupendously efficient Supercaliber for such endeavours.

Component highs & lows

The 2022 Trek Fuel 9.8 XT is a solid package out of the box, especially when you consider it comes in $1,600 cheaper than the 2021 model. And that’s with a pretty much identical build kit. How has a new bike gotten cheaper in the midst of a global pandemic and industry-wide component shortages? Heck knows!

There’s not a lot to be said about the Shimano XT groupset – it works, it’s solid, and it’s easy to tune. The I-Spec mounts offer plenty of adjustability for getting the brake and shift levers into the right spot, and the integrated dropper lever is a nice touch too.

The RockShox suspension isn’t quite as sensitive as the Fox equivalent, particularly the SID Select+ fork, which felt a little stickier than we expected. Otherwise the fork and shock perform well, and the ease of setup is great.

The Bontrager dropper post works fine, but the action is sluggish compared to some of its competitors. And while the carbon handlebars offer a nice profile, having spent a lot of time on OneUp handlebars lately, the Bontrager Line Pro feels considerably harsher in comparison.

We’ve had excellent long-term experience with Bontrager’s latest Line Pro & Line Elite carbon wheels , which feature thick carbon beads that are designed to increase impact strength while also reducing the chance of pinch-flats. They’re totally solid and come with an excellent crash-replacement guarantee, while the buzzy 108pt engagement freehub delivers rapid pickup at the pedals. As mentioned earlier though, they are heavy, providing an opportunity to drop significant weight with a wheel upgrade.

Otherwise we’ve been impressed with the frame finish so far. The Mino Link is simple and effective, the Knock Block is totally unnoticeable on the trail, and we’re big fans of the built-in storage from the Burrito Box. Or is it the Kebab Cave? Maybe a Sausage Roll Hole? Sushi Shaft? Cannoli Cavity? Hot Dog Hollow? Spring Roll Room?

Alright, alright! We’ll show ourselves the door…the door that leads into the Spring Roll Room – ha!

Flow’s Verdict

Tying together a whole suite of updates to the frame and suspension design, there are no doubts that the new Trek Top Fuel is a more capable bike than its predecessor. It’s still very efficient, but having adopted a more progressive approach to its geometry, it delivers a significant improvement in stability. Along with the active ABP suspension design and chunky tyres, there’s an exceptional amount of grip and support on offer for a 120mm travel bike.

With all those changes, the Top Fuel moves even further away from the Supercaliber. And for some riders, that gap will be a little too wide.

Trek seems happy to have a clear delineation between the two platforms though. This differs from some other brands that utilise a single frame, and simply up-fork and up-shock it to create a slightly longer travel bike (like the Specialized Epic EVO and Orbea Oiz TR). The Top Fuel is not one of those bikes.

Instead of being a long-legged Supercaliber, it’s really a shrunken-down Fuel EX, albeit one with more contemporary geometry. And having ridden both bikes, unless you really need the extra travel of the Fuel EX, this is arguably the better option.

Sure it may have put off the weight-weenies and lockout-lovers, but there’s no denying that the Top Fuel has broadened its appeal to an even wider range of riders, and we reckon it’s more fun as a result.

2022 Trek Top Fuel 9.9 XTR

• Fork | Fox 34 Step-Cast, Factory Series, FIT4 Damper, 44mm Offset, 120mm Travel
• Shock | Fox Float DPS, Factory Series, 185x50mm
• Wheels | Bontrager Line Pro 30, OCLV Carbon Rims, 29mm Inner Width
• Drivetrain | Shimano XTR 1×12 w/e*thirteen TRS Race Carbon 30T Crankset & 10-51T Cassette
• Brakes | Shimano XTR Race 2-Piston w/Ice Tech Rotors
• Bar | Bontrager RSL Integrated, OCLV Carbon, 27.5mm Rise, 820mm Width
• Stem | Bontrager RSL Integrated, OCLV Carbon, Length: 35mm (S), 45mm (M-XL)
• Saddle | Bontrager Arvada Pro, Carbon Rails
• RRP | $14,199 AUD

2022 Trek Top Fuel 9.7

• Fork | Fox Rhythm 34, GRIP Damper, 44mm Offset, 120mm Travel
• Shock | Fox Float DPS, Performance Series, 185x50mm
• Wheels | Bontrager Line Comp 30, Alloy Rims, 29mm Inner Width
• Drivetrain | Shimano SLX/XT 1×12 w/Deore 30T Crankset & 10-51T Cassette
• Brakes | Shimano SLX 4-Piston
• Bar | Bontrager Line, 27.5mm Rise, Width: 750mm (S), 780mm (M-XL)
• Stem | Bontrager Elite, 45mm Length
• Seatpost | TranzX Dropper, 34.9mm Diameter, Travel: 100mm (S), 150mm (M-M/L), 170mm (L), 200mm (XL)
• Saddle | Bontrager Arvada, Steel Rails
• RRP | $6,299 AUD

2022 Trek Top Fuel 8

• Frame | Alpha Platinum Alloy, ABP Suspension Design, 120mm Travel
• Fork | RockShox SID, Rush RL Damper, 44mm Offset, 120mm Travel
• Brakes | Shimano Deore 4-Piston
• RRP | $5,299 AUD

2022 Trek Top Fuel 5

• Fork | RockShox 35 Silver RL, Motion Control Damper, 44mm Offset, 120mm Travel
• Shock | X-Fusion Pro 2, 185x50mm
• Wheels | Bontrager Alloy Hubs & Alex MD35 Rims
• Drivetrain | Shimano Deore 1×12 w/Deore 30T Crankset & 10-51T Cassette
• Brakes | Shimano MT200 2-Piston
• Bar | Bontrager Comp, 15mm Rise, 750mm Width
• Stem | Bontrager Rhythm Comp, 50mm Length
• Seatpost | TranzX Dropper, 34.9mm Diameter, Travel: 100mm (S), 150mm (M-M/L), 170mm (L-XL)
• RRP | $3,499 AUD
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Trek Fuel EX 8 review – still one of the best trail MTBs?

Trek’s alloy fuel ex trail mountain bike lacks the latest features but is the overall package still a winner.

BikePerfect Verdict

Heavy frame that misses the latest features but still a great package for fast and precise all round mountain biking

Tight, precise frame

Sorted all round handling

Very efficient suspension feel

Durable Shimano kit

Excellent sizing options

Heavy frame

No internal storage

Press fit bottom bracket

Top Fuel is more playful

Why trust BikePerfect Our cycling experts have decades of testing experience. We'll always share our unbiased opinions on bikes and gear. Find out more about how we test.

Trek’s Fuel EX has been one of the best mountain bikes in the world for years, but the alloy-framed 8 is lacking some of the features the latest alloy and carbon Treks. High-durability component spec matches the vibe of a really well-balanced bike. One that plans ahead, hands its homework in early (having double checked it) and rarely puts a wheel wrong or goads you into being silly yourself. So how has Trek done that and is there a better option in the range if you want something short on travel but big on fun?

Design and aesthetics

Trek has been using a rocker link-driven, vertical shock suspension design on its bikes for so long that “Looks like a Trek Session” is a cliche on most MTB forums. No surprise then that the Fuel EX continues the clean looks which leave plenty of room for a big bottle on the down tube and strap-on storage. You don’t get the internal storage of the newer Top Fuel alloy frame though and this older frame still uses a press-fit bottom bracket rather than reverting to a more reliable threaded  format. There are ISCG chain keeper tabs on the BB though, a wider-angle Knock Block steering limiter to stop bars hitting the frame in a crash and rear axle concentric ABP rear suspension pivot. Cunning zip tie tabbed ‘Control Freak’ internal cable routing and rubber frame armor including molded chainstay sleeves keep things quiet. 

You also get the 0.5-degree geometry change ‘Mino Link’ flip chip at the seat stay/rocker pivot. That changes head angle from 65.5- to 65-degrees and effective seat angle from 75.5- to 75-degrees on the Large I tested. Reach also shifts from 475 to 470mm and BB height drops from 346 to 340mm. The big win with choosing a Trek though is the sheer range of sizes from XXS to XXL including a sweet spot ML in the centre. Smaller bikes also run 27.5in wheels for proportional balance, too, although the chainstays are the same length on all frame sizes. The Fuel EX 8 is also available in three different two-tone color options.

Specification

Trek acknowledges that the ‘priority is on the parts’ with the EX 8 and the highlight is an almost complete Shimano XT drivetrain (the chain is SLX). The Fox Float shock is a custom unit, too, using a Penske race car derived RE:aktiv damper setup for a pert-pedaling feel on top of the 130mm travel. The 140mm Fox 34 fork is the stock Rhythm spec though and the Shimano brakes are basic four-piston MT400s. Bontrager’s functional Line component range completes the bike in well-judged, size-specific cockpit options although dropper post strokes are short on the larger sizes. Big volume versions of Bontrager’s XR5 and XR4 tires on Bontrager Line Comp 30mm internal rims put plenty of air between bike and trail for protection, too.

Performance

While the EX8 isn’t light at just under 15kg (a full kilo heavier than Trek claims) it’s in the ballpark for a mid-travel, alloy-framed bike at this price. What really stands out is how well it hides that weight when it comes to pedaling. The big tires don’t drag nearly as much as they look like they might, while the RE:aktiv shock and overall kinematic give it a really clean, crisp and stable platform to put down power from. That means even with three potential low-compression settings to play with, we rarely felt compelled to flick it out of full open unless we were hoofing uphill out of the saddle. Add the clean shifting, top-quality Shimano XT drivetrain and the Fuel EX is a great choice for high-mileage rides and riders. The fast-engaging ‘Rapid Drive’ freehub and relatively high ground clearance are a bonus for anyone who likes to kick hard out of corners or attack rough technical climbs, too. The efficient suspension feel still gives enough sensitivity to track the ground under power and you can drop pressures in the big tires if you’re into a proper ‘crawler/swamper’ feel. 

The 140mm fork/130mm rear travel feels well balanced on the trail and the Grip damper Fox Rhythm repeatedly proved why its our favorite cost-effective fork. Trek’s suspension calculator is accurate enough to get most people sorted on set-up for most situations. The angles and proportions of the model we tested were confident at speed on jumps but still turned in promptly on woodland twisters. Even the basic Shimano brakes feel better than normal through the neutral suspension responses created by the ABP pivot and the 200mm rotor up front boosts power, too.

While you could speed up reactions with a shorter stem, the stock setup probably suits its overall character better. That’s because while it will pop and play off trailside opportunities if you’re in the mood, it does tend to sit on top of an already relatively high ride height rather than sucking down onto the trail and railing. Interestingly that’s a big - and counter intuitive - difference to the Top Fuel 8. With slightly steeper angles, less travel, significantly different suspension kinematic and top-spec RockShox rear shock, Trek’s pocket rocket has an addictively playful charisma that’s very much at odds with it’s ‘XC’ categorization. 

In fact, despite it being heavier we’d probably opt for the Fuel EX for long marathon-style or efficiency-based events, especially as it’s significantly cheaper than its little brother, leaving you more cash for race entries and energy products. Just make sure you keep an eye on the press-fit bottom bracket and get it replaced as soon as it shows any signs of wobble/creak as that can eventually creates frame issues.

Trek’s Fuel range might be a bit backwards when it comes to assigning categories based on travel but the main thing is that the Fuel EX is still a really efficient, enjoyable and fitness/skill flattering all rounder. While it misses out on the internal storage, threaded BB and super-plush playfulness of the Top Fuel, Shimano XT will always bring a lot of hard riding boys (and girls) to the yard. Those are exactly the riders who’ll appreciate just how well this extremely well balanced bike covers ground and keeps a fresh and sharp feel long into the day, and down tough technical sections, too. 

Tech Specs: Trek Fuel EX 8 XT

• Price: $3,929.99 / £3,200
• Discipline: Trail
• Head angle: 66/66.5-degrees
• Frame material: Trek Alpha Platinum Aluminum
• Sizes: XS, S, M, M/L, L (tested) XL, XXL
• Weight: 14.9kg
• Wheel size: 29 x 2.3in
• Suspension (front/rear): Fox Rhythm 34, Float EVOL 140mm travel, 44mm offset/Fox Performance Float EVOL, 3-position RE:aktiv 130mm travel
• Components: Shimano XT 10-51T, 12-speed gearing, shifter, chainset and cassette. Shimano SLX chain. Shimano MT400 brakes with 200/180mm rotors. Bontrager XR4 Team Issue 29 x 2.6in front and Bontrager XR5 Team Issue 29 x 2.5in rear tires on Bontrager Line Comp 30 wheels. Bontrager Line 780 x 35mm bar and 50 x 35 mm stem, Bontrager Line Dropper 150mm dropper post, Bontrager Arvada saddle

Guy has been working on Bike Perfect since we launched in 2019. Hatched in Yorkshire he's been hardened by riding round it in all weathers since he was a kid. He spent a few years working in bike shops and warehouses before starting writing and testing for bike mags in 1996. Since then he’s written several million words about several thousand test bikes and a ridiculous amount of riding gear. To make sure he rarely sleeps and to fund his custom tandem habit, he’s also penned a handful of bike-related books and talks to a GoPro for YouTube, too.

Current rides: Cervelo ZFS-5, Forbidden Druid V2, Specialized Chisel, custom Nicolai enduro tandem, Landescape/Swallow custom gravel tandem

Height: 180cm

Weight: 69kg

• Guy Kesteven Technical-Editor-at-Large

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2023 Trek Fuel EX 8 Gen 5 Review

Are you in search of a mountain bike that will get you through the toughest trails without fail? You might want to check out the Trek Fuel EX 8 Gen 5.

Trek has become a leader in the mountain bike space, releasing exceptional models at different price points. The latest iteration of their Fuel EX series is no exception, but how does it fare against its rivals?

The Trek Fuel EX 8 Gen 5 has become one of the most popular mountain bikes around, and for good reason. In this review, we’ll take an in-depth look at this model and analyze its features, performance, durability and price.

Whether you’re a novice or experienced rider, there’s something here for everyone. So let’s dive right into this comprehensive review of the 2023 Trek Fuel EX 8 Gen 5.

If you’re looking for a brand new full suspension trail bike that offers the perfect combination of power and agility, then the Trek Fuel EX 8 Gen 5 might be the one for you.

From its stiff frame to its smooth suspension and powerful drivetrain, this bike has it all. Let’s take a closer look at what makes the Trek Fuel EX 8 Gen 5 so special.

The 2023 Trek Fuel EX 8 Gen 5 is a premier mountain bike, designed to provide the ultimate off-road experience.

It features Fox Suspension, each with 140mm of active travel up front and 210mm x 52.5mm out back, giving you a responsive and controlled ride.

The frame is made with Alpha Platinum Aluminum for superior durability and stiffness, plus it’s packed full of features like tapered head tube, Knock Block, Control Freak internal routing, downtube guard, magnesium rocker link, Mino Link, and Boost 148 spacing.

You also get Shimano XT 12-speed drivetrain for smooth shifting and reliable gear selection, as well as Bontrager XR5 Team Issue tires for grip across any terrain.

– Lightweight Alpha Platinum Aluminum frame

– Fox Rhythm 34 front fork with Float EVOL air spring, GRIP damper, and 140mm of travel

– Fox Performance Float EVOL with 3-position RE:aktiv damper and 210mm x 52.5mm of travel

– Shimano XT 12-speed drivetrain delivers reliable shifting performance

– Bontrager XR5 Team Issue tires offer supreme grip on any terrain

– Sleek internal cable routing keeps the frame looking clean

– Bontrager Line Dropper seat post

The Trek Fuel EX 8 Gen 5 features an Alpha Platinum Aluminum frame that is both lightweight and stiff — just what you need for a precise ride when going up or down rocky trails.

The frame is equipped with internal routing and includes a Bontrager Line Dropper seat post, making it easier to get your saddle out of the way when bombing those descents.

The 140mm Fox Rhythm 34, Float EVOL air spring fork ensures a smooth ride while providing enough control to handle any bumps in the road.

The rear Fox Performance Float EVOL shock utilizes a 3-position RE:aktiv damper, providing 210mm x 55mm of travel with boost valve adjustment and rebound damping, allowing you to fine tune it according to your preference.

The 12-speed Shimano XT drivetrain provides reliable and precise shifting across all terrains – from urban roads to rugged mountain paths.

This drivetrain is equipped with an 10-51t cassette paired to a 30t chainring, offering plenty of range for climbing or descending steep trails effortlessly.

Wheels and Tires

The 29″ Bontrager Line Comp 30 wheelset with Bontrager XR5 Team Issue tires are tubeless ready and feature Boost 148 spacing.

Thanks to this setup, you can expect increased levels of stability even on trail surfaces that are less than ideal — so no more worrying about skidding off the trail during those unexpected moments!

All in all the Trek Fuel EX 8 Gen 5 offers plenty of features that make it a great choice for off-road adventure seekers out there – from its stiff and lightweight frame, to its smooth suspension and powerful drivetrain.

Whether you’re getting ready for your first mountain biking experience or seeking to upgrade your gear – this bike will provide all the features necessary for conquering any terrain that comes along your way!

Order online and have it shipped to your local dealer for final assembly!!

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Trek Fuel 80

• AUS $ NZD $ USD $ CAD $ GBP £ EUR €

Size / 15.5", 17.5", 19.5", 21.5"

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Where to buy.

Specifications

• Frame Fully independent cross-country suspension at a hardtail weight. ZR 9000 Alloy™ delivers exceptional speed and durability.
• Fork RockShox Pilot SL, Air Assist preload, HC2 damping, adjustable rebound, chromed uppers, 80mm travel
• Wheels Bontrager Corvair, welded, machined sidewall rims; Shimano 9-speed rear, alloy quick release front hub; 14G stainless spokes
• Wheel Size 26"
• Crank Shimano M440 44/32/22
• Front Derailleur Shimano Deore
• Rear Derailleur Shimano Deore
• Shifters Shimano Deore
• Brakeset w/ levers
• Handlebar Bontrager Crowbar Sport
• Saddle Bontrager FS 2000
• Seatpost Bontrager Sport
• Stem Bontrager Sport, 15Ëš
• Headset AHS 1-1/8" semi cartridge, sealed

Q: Where to buy a 2003 Trek Fuel 80?

The 2003 Trek Fuel 80 may be purchased directly from Trek .

Q: What size wheels does the 2003 Trek Fuel 80 have?

The 2003 Trek Fuel 80 has 26" wheels.

Q: What size 2003 Trek Fuel 80 should I get?

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Study of modified VVER and typical PWR fuel in the HBWR reactor (Norway)

• Published: 21 December 2012
• Volume 113 , pages 171–178, ( 2013 )

Cite this article

• B. Yu. Volkov 1 ,
• W. Wiesenack 1 ,
• V. V. Yakovlev 2 ,
• E. P. Ryazantsev 2 ,
• A. K. Panyushkin 3 ,
• A. V. Ivanov 3 ,
• O. V. Kryukov 3 ,
• P. I. Lavrenyuk 4 &
• Yu. V. Pimenov 4  

126 Accesses

3 Citations

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Two experiments studying the standard and modified VVER fuel fabricated at the Machine-Building Plant (in Elektrostal) and PWR fuel produced according to the typical specifications were performed on the HBWR research reactor (Halden, Norway) from 1995 to 2005. The objective of these experiments was to study the effect of the structural-technological parameters on the behavior of VVER fuel in comparison with the typical PWR fuel. These studies made it possible to expand the in-reactor data base on the behavior of VVER uranium oxide fuel as well as to develop recommendations for improving the technology of its production in order to increase fuel stability under irradiation.

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Fuel for VVER and PWR: Current Status and Prospects

D. L. Zverev, O. B. Samoilov, … S. A. Zotov

Techno-Economic Prognosis for the Manufacture of Fuel Assemblies with Mixed Uranium-Plutonium Fuel for the VVER-SKD Power Reactor

M. V. Kormilitsyn, L. A. Kormilitsyna, … T. D. Shchepetina

PWR Fuel Cycle Increased Enrichment, Combination of Burnable Absorbers

B. Yu. Volkov, E. P. Ryazantsev, V. V. Yakovlev, et al., “Studies of the behavior of VVER and PWR irradiated in the HBWR reactor (Halden, Norway),” At. Énerg. , 111 , No. 6, 342–348 (2011).

Google Scholar  

B. Volkov, E. Ryazantzev, and V. Yakovlev, The Thermal and Mechanical Behaviour of Modified WWER Fuel Compared with PWR Specification Fuel in IFA-503.2 , HWR-637, December 2000.

B. Volkov and T. Tverberg, “Irradiation performance of modified WWER fuel compared with typical PWR fuel in the Halden Reactor Test,” in: 4th Int. Conf. on WWER Fuel Performance, Modelling, and Experimental Support , Bulgaria, Varna, Oct. 15, 2001, pp. 186–196.

B. Volkov and E. Kolstad, “Review of WWER fuel and material tests in the Halden reactor,” in: 6th Int. Conf. on WWER Fuel Performance, Modelling and Experimental Support , Bulgaria, Albena, Sept. 19–23, 2005, pp. 214–221.

K. Vinjamuru and D. Owen, “Helium fill gas absorption in pressurized UO2 fuel rods during irradiation,” Nucl. Technol ., 47 , No. 1, 119–124 (1980).

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Article   MathSciNet   ADS   Google Scholar  

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W. Wiesenack and T. Tverberg, “Thermal performance of high burnup fuel – in-pile temperature data and analysis,” in: Int. Topical Meeting on LWR Fuel Performance , Utah, USA, April 10–3, 2000, pp. 626–633.

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Halden Reactor Project, Halden, Norway

B. Yu. Volkov & W. Wiesenack

National Research Center Kurchatov Institute, Moscow, Russia

V. V. Yakovlev & E. P. Ryazantsev

Machine-Building Plant, Elektrostal, Moscow Oblast, Russia

A. K. Panyushkin, A. V. Ivanov & O. V. Kryukov

TVEL Company, Moscow, Russia

P. I. Lavrenyuk & Yu. V. Pimenov

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Translated from Atomnaya Énergiya, Vol. 113, No. 3, pp. 140–145, September, 2012.

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Volkov, B.Y., Wiesenack, W., Yakovlev, V.V. et al. Study of modified VVER and typical PWR fuel in the HBWR reactor (Norway). At Energy 113 , 171–178 (2013). https://doi.org/10.1007/s10512-012-9613-7

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Received : 14 February 2012

Published : 21 December 2012

Issue Date : January 2013

DOI : https://doi.org/10.1007/s10512-012-9613-7

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