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Trek Fuel EX 8 GX

Trek Fuel EX 8 GX
  • Color: Rage Red to Dnister Black Fade
  • Color: Dark Aquatic/Trek Black
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Fuel EX 8 is the ideal trail bike for riders who want a versatile full suspension ripper that makes soul-crushing climbs less painful, but can also huck rowdy trails. It hits the sweet spot of value and performance in our mountain bike lineup by combining high-end parts with a stout but light alloy frame.

It's right for you if...
You're cool with your wheels leaving the ground, but you also like to go the distance on marathon singletrack sessions. You want a bike that lets you crush any trail, and your priority is on the parts.

The tech you get
A lightweight aluminum frame, 140mm FOX Rhythm 34 fork, and 130mm of rear travel with an extra-efficient RE:aktiv damper. A SRAM GX Eagle 1x12 drivetrain with an extra-low 52-tooth climbing gear, plus a Bontrager Line dropper post.

The final word
Fuel EX 8 gives you added efficiency with SRAM's latest, widest-range drivetrain and Trek's unique RE:aktiv damper that provides firm pedaling support without giving up any plush compliance.

Why you'll love it
- A wider gear range and more efficient suspension help you claw your way up tricky climbs you never thought you'd clean
- If you measure quality in performance per dollar, you won't do better than Fuel EX 8
- This bike will make you want to rail every corner, smash every rock garden, and charge every descent
- The shifter-style, underbar remote dropper post lever is super intuitive and easy to use
- We expanded our size range to ensure a better fit for all riders. And, you get the fastest wheel that fits your frame: XS frames get 27.5-inch wheels, S frames get to choose between 27.5-inch or 29-inch, and sizes M to XL get 29-inch wheels

Wheel size:
Sizes X-Small – Small: 27.5-inch
Sizes Small – XX-Large: 29-inch

Will my bike have a curved top tube?

Smaller frames (XS and S) have a top tube that dips down as it approaches the seat tube. This design makes for a lower standover height, which is good for shorter riders because it allows them to straddle their bike more easily. Larger frames (M and up) have a straight top tube because taller riders with longer legs typically don’t have the same issues with standover height.


Frame Alpha Platinum Aluminum, tapered head tube, Knock Block, Control Freak internal routing, downtube guard, ISCG 05, magnesium rocker link, Mino Link, ABP, Boost148, 130mm travel
Fork Fox Rhythm 34, Float EVOL air spring, GRIP damper, tapered steerer, 44mm offset, Boost110, 15mm Kabolt axle, 140mm travel
Headset Knock Block Integrated, 58-degree radius, cartridge bearing, 1-1/8'' top, 1.5'' bottom
Rear Shock Fox Performance Float EVOL, RE:aktiv 3-position damper, tuned by Trek Suspension Lab
Axles Front: 110 x 15mm
Rear: 148 x 12mm
Rims/Wheels Front: Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle
Rear: Bontrager Line Comp 30, Tubeless Ready, 6-bolt, 54T Rapid Drive, SRAM XD driver, Boost148, 12mm thru axle
Tires Size XS - SM: Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120 tpi, 27.5x2.40''
Size SM - XXL: Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewall, aramid bead, 120 tpi, 29x2.40''
Crankset SRAM X1 Eagle, DUB
Chainrings 30T steel ring
Bottom Bracket SRAM DUB, 92mm, PressFit
Chain SRAM GX Eagle, 12 speed
Rear Derailleur SRAM GX Eagle
Cassette/Rear Cogs SRAM Eagle XG-1275, 10-52, 12 speed
Shifters SRAM GX Eagle, 12 speed
Handlebars Bontrager Line, alloy, 35mm, 27.5mm rise, 750mm width
Stem Bontrager Line, 35mm, Knock Block, 0 degree
Brakes SRAM G2 R 4-piston hydraulic disc
Pedals Sold separately
Saddle Bontrager Arvada, hollow chromoly rails, 138mm width
Seat Post Bontrager Line Dropper, internal routing, 31.6mm

* Subject to change without notice.


Part Numbers

Option UPC MPN Store SKU
Rage Red to Dnister Black Fade / X-Small / 27.5-inch 601842369999 1044468 FUE39886922E
Rage Red to Dnister Black Fade / Small / 27.5-inch 601842369982 1044469 FUE3853311E
Rage Red to Dnister Black Fade / Small / 29-inch 601842369975 1044470 FUE37893108E
Rage Red to Dnister Black Fade / Medium / 29-inch 601842369968 1044471 FUE37187962E
Rage Red to Dnister Black Fade / Medium/Large / 29-inch 601842369951 1044472 FUE38714141E
Rage Red to Dnister Black Fade / Large / 29-inch 601842369944 1044473 FUE37117207E
Rage Red to Dnister Black Fade / X-Large / 29-inch 601842369937 1044474 FUE38483415E
Rage Red to Dnister Black Fade / XX-Large / 29-inch 601842369920 1044475 FUE39421718E
Dark Aquatic/Trek Black / X-Small / 27.5-inch 601842370070 1043232 FUE3480618K
Dark Aquatic/Trek Black / Small / 27.5-inch 601842370063 1043234 FUE33288448K
Dark Aquatic/Trek Black / Small / 29-inch 601842370056 1043236 FUE32961711K
Dark Aquatic/Trek Black / Medium / 29-inch 601842370049 1043237 FUE3224956K
Dark Aquatic/Trek Black / Medium/Large / 29-inch 601842370032 1043238 FUE3331915K
Dark Aquatic/Trek Black / Large / 29-inch 601842370025 1043239 FUE32978285K
Dark Aquatic/Trek Black / X-Large / 29-inch 601842370018 1043240 FUE33426911K
Dark Aquatic/Trek Black / XX-Large / 29-inch 601842370001 1043241 FUE34576156K