Image of Trek Fuel EX 9.9 29er

Trek Fuel EX 29er Review

The mountain bikes in the Trek Fuel EX range are many and varied, with both 26 and 29 inch wheels available depending on the model you pick. The unifying feature is the underlying design which is designed to be as versatile as possible, offering full-sus setups that are suitable for racing or uncomplicated all-day excursions of your own inception.

Trek Fuel EX 6

The Fuel EX 6 is a good introduction to the range as a whole, featuring an Alpha Aluminium frame, RockShox Monarch RL rear shock and a Sektor Solo Air front fork, combining to bring the maximum travel to 130mm.

Shimano SLX and Deore components come together in the drivetrain and you get Avid Elixir 3 hydraulic disc brakes to boot.

Trek Fuel EX 8

The Fuel EX 8 relies on the same frame and has clean, internal cable routing for added resilience and convenience. A Fox DRCV fork works together with a similarly equipped rear shock from the same firm, while a Shimano SLX drivetrain and brakeset is a good fit for this bike.

Trek Fuel EX 9.8

If you want the benefits of this 26 inch full-sus mountain bike range but would prefer a carbon frame to an alloy one then this is the model to pick. It comes with mountain-ready carbon components, a RockShox Reverb Stealth dropper post and the Bontrager Evoke 3 saddle.

Trek Fuel EX 5 29er

The Fuel EX 5 29 is a 29er, as the name suggests, so you get big Bontrager XR3 tyres and accompany double-walled rims for hardiness and grip, as well as the fast rolling momentum that you would expect. The alloy frame uses a RockShox XC32 fork and Monarch RL rear shock to give 120mm of travel, while SRAM X5 components are found in the drivetrain and Shimano M395 hydraulic disc brakes keep everything under control.

Trek Fuel EX 6 29er

This is another alloy-framed 29er, but with a RockShox Recon Gold fork with Solo Air technology, Bontrager XR850 rims and a drivetrain that lets Shimano Deore and SLX components do all the heavy lifting. The Shimano M445 hydraulic disc brakes are a step up in this instance.

Trek Fuel EX 7 29er

Fox provides the suspension at the front and rear from its Evolution Series, while a variety of Shimano equipment is used in the drivetrain, including Deore shifters, SLX derailleurs and an M552 crank.

Trek Fuel EX 8 29er

Shimano SLX hydraulic disc brakes give the Fuel EX 8 29 a bit more to brag about than its cheaper stable mates, while the Bontrager Rhythm Elite seatpost is also included and helps improve comfort, adjustability and the overall experience of the ride.

Trek Fuel EX 9 29er

For the Fuel EX 9 29, Trek’s own engineers have got involved with the Fox Performance Series Float rear shock to tune it so that it is better able to work in unison with the rest of the bike. The fork is also from Fox and as part of the Factory Series it comes with a Kashima coating to reduce friction and enhance suspension performance.

Shimano XT drivetrain components and brakes are featured on this model, along with Bontrager Rhythm Elite TLR wheels.

Trek Fuel EX 9.7 29er

This 29er comes with an OCLV carbon frame and the same geometry as its alloy allies, which makes for a lighter bike that is still just as strong.

Trek Fuel EX 9.8 29er

The carbon frame gets additional carbon components in this iteration, including the OCLV Mountain seatstay. Shimano XT crank, brakes and Shadow Plus drivetrain components are a welcome inclusion, along with the RockShox Reverb Stealth dropper post and Fox’s CTD (climb trail descend) three-option damper settings.

Trek Fuel EX 9.9 29er XTR

The Kashima coating on the Fox Factor fork returns for this carbon model, along with a full Shimano XTR 2×10 drivetrain and XTR brakes to complete the set. The Bontrager Evoke RXL saddle is very light and comes mounted on carbon rails, while even the chainstay is fashioned from this material.

Trek Fuel EX 9.9 29er XX1

The Trek EX 9.9 29 is, along with the XTR model, at the pinnacle of this particular range, with professional riders kept in mind throughout its design. A RockShox Revelation RCT3 Solo Air fork comes with Motion Control DNA damper technology, while the rear end is propped up with a full float Fox Factor series shock sporting Kashima coating.

The SRAM XX1 drivetrain is suitably intimidating both in its name and the performance it offers, while the Bontrager Race XXX Lite carbon stem is matched with handlebars, seatpost and other carbon elements. Avid XO Trail hydraulic disc brakes are the cherry on the costly cake.

Trek Fuel EX Custom Models

There are customisable versions of the Fuel EX available with both alloy and carbon frame options on offer should you wish to get into the nitty gritty of the technical specs.