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Bontrager DuoTrap Review

Von Collins is an accomplished triathlete and endurance cyclist, and the author of four fitness and training books: Smarter Running, Your First Triathlon Guide, Fit Foods, and 30 Rut-Busting Workouts . He has been cited as a triathlon, cycling, and fitness expert by Healthline, CNET, Forbes, Eat This, Not That and other major outlets.

The Bontrager DuoTrap is an intriguing device for cyclists, especially those who use Trek bikes.  We needed to take a look at one close-up, and share with you our thoughts.  Overall, the DuoTrap is a good, smart device to add precision to your training, as long as you are using a bike that is compatible with it.

How we Got Here

From the days of wooden rims to the modern aero age, the beauty of cycling on the road has always been its relatively few ingredients: a rider and their bike to start, company and destination optional. That simple formula contains a surprising amount of work behind the scenes, with bicycle technology and rider training the key to longer distances and higher speeds. But while even the most stealth bomber-inspired aero machines are still unmistakably bikes, technology has transformed rider training almost beyond recognition. Data collection, and the devices that enable it, have unlocked increased efficiency and gains, giving any serious rider professional-level training insights – or sometimes better.  That is where Bontrager’s DuoTrap comes in.

Speed is an obvious and critical measurement for most cyclists – for many, it’s also the ultimate objective of their training. Cadence, meaning the rate of pedaling, is another core measurement of a cyclist’s performance and riding style. Most cadence and speed sensors operate on the same principle, detecting each time a crank or wheel magnet rotates past an electronic pickup point. Early examples were clumsy, wired affairs, but still a welcome improvement in convenience over a chase car. Modern cadence sensors not only lose the wires in favor of wireless communication, they also integrate with other sensors at a single computer and screen head unit. This integration allows the simultaneous collection of data like cadence, power, heart rate and more.  The DuoTrap attempts to take it to the next level in a small, elegant piece of bolt-on gear.

The Bontrager DuoTrap

Owners of non-Trek bikes are left in the cold by the DuoTrap system, which is the single most important thing for a window shopper to know about this unit.  Don’t despair, non-Trek owners can still enjoy ample choice of head unit and sensor systems. Those universal options can also be used even on Trek models with DuoTrap provisions.

If other sensors can be used on a Trek anyway, it raises an important question: Should Trek owners always take advantage of DuoTrap compatibility over competitors?  The short answer is yes. Bontrager’s DuoTrap sits at the higher end of the sensor price range, and while integration alone justifies a price premium, the DuoTrap’s features are best in class.  Integration is an important factor when you start adding in precision bike parts like power meters or sensers.

Our First-Hand Experience Using the DuoTrap

We gave the DuoTrap a test for a couple weeks, in a number of different conditions.  We used it on a road bike that was ridden several times a week.  We liked what it gave us.

The first thing we appreciated about the DuoTrap was its seamless connectivity with bike computers and other devices — in our case, our preferred Garmin watch picked up the DuoTrap with no issues, and once paired, never had to be reminded to look for it.  Note that older watches might struggle to pick the DuoTrap signal up — not because of the DuoTrap, but because some of those older watches just were not built with the expectation that they would track things like bike cadence.  If you have not upgraded your fitness tracker in the last 3 years, you may want to consider an upgrade.  The use cases on the typical Garmin has exploded in the past 36 months and that pace doesn’t appear to be slowing down.

The hardest part of us, quite honestly, was finding a Trek-compatible bike to use the DuoTrap on.  We have been riding bikes made by a lot of diffeent manufacturers, and to give this device a good test, we had to track down a Trek that we had had given to someone else.  This is probably the biggest downside of the DuoTrap.  Additionally, based on our riding, we would be hesitant to use it in a high-wear environment, such as on a mountain bike that is kicking up lots of rocks, or a fat bike that might be churning through deep snow and ice.

Find the DuoTrap here.

DuoTrap Alternatives

Inexpensive alternatives for speed and cadence sensors may be tempting, but can suffer a variety of shortcomings: For instance, the attractively priced Magene S3+ claims ANT+ and Bluetooth connectivity, but can only measure either speed or cadence at any given time. CatEye and Pioneer’s ANT+ speed and cadence sensors each undercut DuoTrap significantly but lack Bluetooth connectivity.

Stages or Garmin sensors seem a compelling value at first glance, comparing favorably in features to DuoTrap, but note that speed and cadence each require an individual sensor.  We have always liked the Stages sensors , as they stand-up well to wear and rough conditions, and have a simple design that is easy to install.  Once installed, you kind of forget about them which is exactly what you want.  If you don’t ride a Trek bike, we recommend the Stages sensors.  You can see the Stages speed sensor here , and the Stages cadence sensor here .

Even the comparatively high end Wahoo RPM or Blue SC sensors only match the DuoTrap on features without achieving the same integration. However, some users claim the Wahoo options are easier to reliably connect with third-party apps such as Zwift.  See the Wahoo RPM here on Amazon.

Overall, the Bontrager DuoTrap is well worth its price for owners of compatible bikes, with best-in-class connectivity and features even before factoring in its tidy frame integration. With the incredible refinement and performance of modern bikes, DuoTrap compatibility and other onboard technologies could even provide Trek an edge over competitors to attract new bike shoppers. With ANT+ and Bluetooth sensors now available from most every head unit and computer brand, more innovations like DuoTrap could be on the horizon. For now, Trek is an undeniable leader in cycling technology integration.  

1 thought on “Bontrager DuoTrap Review”

Can you recommend an affordable app for an Android Phone? Strava costs too much for me, and Wahoo won’t let you change the wheel size, so it’s inaccurate.

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How to use duotrap bontrager bluetooth

• Jessie Greenfelder DVM

Bluetooth Smart Connection: Install and activate sensor. Turn on your phone's (or other compatible device) Bluetooth capability. Open the desired cycling app and follow instructions for Bluetooth Smart sensor connection.

How does DuoTrap Bluetooth work?

What is duotrap bluetooth on bikes, what does duotrap bontrager bluetooth do, does duotrap work with iphone, how do i connect my cadence sensor to my phone, what does ant+ compatible mean, how do you reset the bontrager duotrap, how do i enable duotrap, do trek bikes come with duotrap, what is bike cadence, how does cadence sensor work, can apple watch measure cycling cadence, why is my bluetooth not pairing, how do i make my bluetooth discoverable, how do i force a bluetooth device to pair.

Bontrager DuoTrap is the integrated sensor that wirelessly transmits ANT+ and Bluetooth® Smart signals to your computer or phone. The easy-to-use sensor installs in seconds and fits directly into the chainstay of select Trek bicycles for a clean look and preserved aerodynamics.

As the name suggests, DuoTrap is a two-in-one sensor for both speed and cadence. Transmitting both Bluetooth and ANT+ data, the DuoTrap can interface with common ANT+ head units such as Garmin and Wahoo devices, as well as Trek's own Bontrager line.

Bontrager DuoTrap S is the integrated sensor that wirelessly transmits ANT+ and Bluetooth® Smart signals to your computer or phone. The easy-to-use sensor installs in seconds and fits directly into the chainstay of select Trek bicycles for a clean look and preserved aerodynamics.

I was able to get the DuoTrap S to talk to my iPhone XS Max by pairing it first in an app called Cyclemeter. Once it is paired in Cyclemeter, it then shows up in Stava. Both Apps show the speed and cadence. It will not pair through the Bluetooth option in the iPhone settings.

Make sure you have Bluetooth turned on. Activate the Wahoo RPM Cadence by shaking it for a few seconds or if attached to your bike, spin the wheel a few times. Select "Saved Devices” icon on the top action bar. Select the plus "+” icon to add a new sensor.

ANT+ stands for interoperability which means that ANT+ products from multiple brands work together. Plus, because devices are compatible, you can always add to or update your monitoring system.

i removed the duotrap then removed the battery. to fully discharge the duotrap you can either wait about 5 minutes or you can take a paper clip and touch the main metal terminal and another metal piece. i used the paper clip and it worked. put battery back in and boom the duotrap reconnected to my garmin.

Now despite this feature being only available on Trek's higher end bikes (around $2,000+), it doesn't actually come with the bike. For that you have to order the separate $59 kit from Trek.

Cadence is fundamentally very simple: it's the number of revolutions your pedals make per minute as you ride. But you don't have to spend too long cycling to see that riders will often pedal at different rates. Watch a bunch of pros in a race and they'll seem to be pedalling really fast, particularly on a flat course.

The design of the cadence sensor The pod contains two magnet sensors to capture both speed and cadence. Each time the magnet passes the pod, it registers the rotation. The result is a sensor that works much like as a speedometer.

Many cadence sensors for bikes are designed to attach to the left-side chainstay. A magnet attached to your crank arm passes the sensor, which in turn records how many times it goes past and then sends a signal to your bike computer.

Using both iPhone and Apple Watch, you can track performance metrics like power, cadence and heart rate and will even let you stream live workout data to be displayed on smartwatch and smartphone.

For Android phones, go to Settings > System > Advanced> Reset Options > Reset Wi-fi, mobile & Bluetooth. For iOS and iPadOS device, you'll have to unpair all of your devices (go to Setting > Bluetooth, select the info icon and choose Forget This Device for each device) then restart your phone or tablet.

Turn ON click (to turn on the Bluetooth and to check if the button is working) Turn OFF click (to turn off the Bluetooth and to check if the button is working) Turn ON click (turn on the Bluetooth again) Discoverable Click (make the device's Bluetooth discoverable)

Once you've opened settings, Bluetooth, you'll want to find your speaker (there should be a list of devices you have connected previously). you want to connect, hold down the Bluetooth key at the top until it starts up, then turn it on afterwards.

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Bontrager DuoTrap S Digital Sensor

Connect ANT+ and Bluetooth Smart devices to all of the data available from the DuoTrap S sensor for your on-the-bike wireless needs. • ANT+ 2.4 GHz and Bluetooth Smart wireless digital speed and cadence sensor • ANT+ and Bluetooth Smart allow simultaneous use of Trip 300 and smartphone • For use with many ANT+ and Bluetooth Smart wireless technology enabled devices • Includes Bontrager wheel magnet, crank cadence band, and CR2032 battery • Works with Trek DuoTrap compatible bikes

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Bontrager DuoTrap S Digital Sensor

Connect ANT+ and Bluetooth Smart devices to all of the data available from the DuoTrap S sensor for your on-the-bike wireless needs. • ANT+ 2.4 GHz and Bluetooth Smart wireless digital speed and cadence sensor • ANT+ and Bluetooth Smart allow simultaneous use of Trip 300 and smartphone • For use with many ANT+ and Bluetooth Smart wireless technology enabled devices • Includes Bontrager wheel magnet, crank cadence band, and CR2032 battery • Works with Trek DuoTrap compatible bikes

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Bontrager DuoTrap S Digital Sensor

Connect ANT+ and Bluetooth Smart devices to all of the data available from the DuoTrap S sensor for your on-the-bike wireless needs. • ANT+ 2.4 GHz and Bluetooth Smart wireless digital speed and cadence sensor • ANT+ and Bluetooth Smart allow simultaneous use of Trip 300 and smartphone • For use with many ANT+ and Bluetooth Smart wireless technology enabled devices • Includes Bontrager wheel magnet, crank cadence band, and CR2032 battery • Works with Trek DuoTrap compatible bikes

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DuoTrap S Digital Smart Cadence Sensor

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Bontrager DuoTrap S is the integrated sensor that wirelessly transmits ANT+ and Bluetooth® Smart signals to your computer or phone. The easy-to-use sensor installs in seconds and fits directly into the chainstay of select Trek bicycles for a clean look and preserved aerodynamics.

• ANT+ 2.4 GHz and Bluetooth® Smart wireless digital speed and cadence sensor
• ANT+ and Bluetooth® Smart allow simultaneous use of Trip 300 and smartphone
• For use with all ANT+ and Bluetooth® Smart wireless technology enabled devices
• Includes Bontrager wheel magnet, crank cadence band, and CR2032 battery
• Visit thisisant.com for a complete list of compatible devices
• Visit bluetooth.com for a complete list of compatible devices

*Fits directly into the frame of DuoTrap S compatible Trek model bikes ONLY*

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