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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

An alloy frame, 140mm FOX Rhythm 34 fork, and 130mm of rear travel with an extra-efficient RE:aktiv damper. A Shimano XT 1x12 drivetrain with an extra-low 51-tooth climbing gear, plus a Bontrager Line dropper post.

The final word

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

See it in action

favorite_borderWhy you'll love it

  1. A wider gear range and more efficient suspension help you claw your way up tricky climbs you never thought you'd clean
  2. If you measure quality in performance per dollar, you won't do better than Fuel EX 8
  3. This bike will make you want to rail every corner, smash every rock garden, and charge every descent
  4. The shifter-style, underbar remote dropper post lever is super intuitive and easy to use
  5. 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˝ wheels, S frames get to choose between 27.5˝ or 29˝, and sizes M to XL get 29˝ wheels


Features

Will my bike have a curved top tube?

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.

Active Braking Pivot

Active Braking Pivot allows our engineers to tune how the suspension reacts to acceleration and braking forces independently. That means you get more confident control when you need it most.

Learn more

RE:aktiv

RE:aktiv technology gives you firm support for efficient pedaling that instantly gives way for smooth control when the trail turns rough.

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Straight Shot w/Knock Block

Trek's Straight Shot frame design optimizes the stiffness-to-weight ratio for a more responsive ride. You'll be able to push harder and stay more planted on your line when the going gets rough.

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Specifications

*spec applies to all sizes unless otherwise noted

Frameset
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
*Shock Size: XS , S
Fox Performance Float EVOL, RE:aktiv 3-position damper, tuned by Trek Suspension Lab, 210x52.5mm
Size: S , M , ML , L , XL , XXL
Fox Performance Float EVOL, RE:aktiv 3-position damper, tuned by Trek Suspension Lab, 210x55mm
Wheels
Wheel front Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle
Wheel rear Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Shimano MicroSpline freehub, Boost148, 12mm thru axle
Skewer rear Bontrager Switch thru axle
*Tire Size: XS , S
Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120 tpi, 27.5x2.40''
Size: XS , S
Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120 tpi, 27.5x2.60''
Size: S , M , ML , L , XL , XXL
Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewall, aramid bead, 120 tpi, 29x2.40''
Size: S , M , ML , L , XL , XXL
Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120 tpi, 29x2.60''
Tire part Bontrager TLR valve, 50mm
Drivetrain
Shifter Shimano XT M8100, 12 speed
Rear derailleur Shimano XT M8100, long cage, 51T max cog
*Crank Size: XS , S
Shimano SLX M7100, 30T alloy ring, Boost (52mm chainline), 170mm length
Size: M , ML , L , XL , XXL
Shimano SLX M7100, 30T alloy ring, Boost (52mm chainline), 175mm length
Bottom bracket Shimano MT500, 92mm, PressFit
Cassette Shimano XT M8100, 10-51, 12 speed
Chain Shimano SLX M7100, 12 speed
Components
Saddle Bontrager Arvada, hollow chromoly rails, 138mm width
*Seatpost Size: XS , S
Bontrager Line Dropper, 100mm travel, internal routing, 31.6mm, 345mm length
Size: M , ML , L , XL , XXL
Bontrager Line Dropper, 150mm travel, internal routing, 31.6mm, 440mm length
*Handlebar Size: XS , S
Bontrager Line, alloy, 35mm, 27.5mm rise, 750mm width
Size: M , ML , L , XL , XXL
Bontrager Line, alloy, 35mm, 27.5mm rise, 780mm width
*Stem Size: XS , S
Bontrager Line, 35mm, Knock Block, 0 degree, 40mm length
Size: M , ML , L , XL , XXL
Bontrager Line, 35mm, Knock Block, 0 degree, 50mm length
Headset Knock Block Integrated, 58-degree radius, cartridge bearing, 1-1/8'' top, 1.5'' bottom
*Brake Size: XS , S , M , ML , L , XL , XXL
Shimano 4-piston hydrauilc disc, MT4100 lever, MT420 caliper
Size: XS , S , M , ML , L , XL , XXL
Shimano hydrauilc disc, MT4100 lever, MT420 4-piston caliper
Brake rotor Shimano RT66, 6-bolt, 180mm
Weight
Weight M - 13.81 kg / 30.45 lbs (with TLR sealant, no tubes)
Weight limit This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 300 pounds (136 kg).
We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colors, and materials.
Bike and frame weights are based off Trek pre-production painted frames at time of publication. Weights may vary in final production.

Sizing & fit

The charts below show our recommended sizes based on height, but there are some other factors, like arm and leg length, that determine a great fit. That’s why you’ll see some overlap in our recommendations. Not every rider who’s 5´8˝, for example, will fit on the same size bike. The best way to find your perfect fit is to consult the experts at your local Trek retailer.

 

Rider Height

Inseam

All measurements provided in cm unless otherwise noted.

Frame size number Frame size letter Geometry position Wheel size A — Seat tube B — Seat tube angle Effective seat tube angle C — Head tube length D — Head angle E — Effective top tube F — Bottom bracket height G — Bottom bracket drop H — Chainstay length I — Offset J — Trail K — Wheelbase L — Standover M — Frame reach N — Frame stack
14.0 XS Low 27.5" 35.6 69.0° 75.0° 9.0 66.0° 54.6 33.5 2.1 43.7 4.3 11.1 112.0 69.5 39.5 56.3
14.0 XS High 27.5" 35.5 69.5° 75.5° 9.0 66.5° 54.5 34.1 1.4 43.6 4.3 10.6 111.9 70.0 40.0 55.9
15.5 S High 27.5" 39.5 69.5° 75.5° 10.0 66.5° 56.7 34.1 1.4 43.6 4.3 10.6 114.3 70.7 42.0 56.8
15.5 S Low 27.5" 39.5 69.0° 75.0° 10.0 66.0° 56.8 33.5 2.1 43.7 4.3 11.1 114.4 70.0 41.5 57.2
15.5 S High 29" 39.5 68.0° 75.5° 10.0 66.5° 57.7 34.6 2.8 43.6 4.3 11.5 115.3 70.7 42.0 60.5
15.5 S Low 29" 39.5 67.5° 75.0° 10.0 66.0° 57.8 34.0 3.4 43.7 4.3 11.9 115.4 70.1 41.5 60.9
17.5 M Low 29" 42.0 67.5° 75.0° 10.0 66.0° 60.3 34.0 3.4 43.7 4.3 11.9 117.9 74.2 44.0 60.9
17.5 M High 29" 42.0 68.0° 75.5° 10.0 66.5° 60.2 34.6 2.8 43.6 4.3 11.6 117.8 74.8 44.5 60.5
18.5 ML Low 29" 43.5 67.5° 75.0° 10.5 66.0° 61.9 34.0 3.4 43.7 4.3 11.9 119.6 74.5 45.5 61.3
18.5 ML High 29" 43.5 68.0° 75.5° 10.5 66.5° 61.8 34.6 2.8 43.6 4.3 11.6 119.5 75.1 46.0 60.9
19.5 L Low 29" 45.0 67.5° 75.0° 10.5 66.0° 63.4 34.0 3.4 43.7 4.3 11.9 121.1 75.0 47.0 61.3
19.5 L High 29" 45.0 68.0° 75.5° 10.5 66.5° 63.3 34.6 2.7 43.6 4.3 11.6 121.0 75.6 47.5 60.9
21.5 XL Low 29" 50.0 67.5° 75.0° 12.0 66.0° 66.3 34.0 3.4 43.7 4.3 11.9 124.2 76.2 49.5 62.7
21.5 XL High 29" 50.0 68.0° 75.5° 12.0 66.5° 66.2 34.6 2.7 43.6 4.3 11.6 124.1 76.8 50.0 62.3
23.0 XXL Low 29" 54.0 67.5° 75.0° 14.0 66.0° 68.8 34.0 3.4 43.7 4.3 11.9 127.0 80.0 51.5 64.5
23.0 XXL High 29" 54.0 68.0° 75.5° 14.0 66.5° 68.7 34.6 2.7 43.6 4.3 11.6 126.9 80.6 52.0 64.1

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