2021 Trek Fuel EX 8

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  • Regular price $4,999.99

2021 Trek Fuel EX 8

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 line-up 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 aluminium frame, 140 mm FOX Rhythm 34 fork, and 130 mm of rear travel with an extra-efficient RE:aktiv damper. A SRAM GX Eagle 1x12 drive train 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 drive train and Trek's unique RE:aktiv damper that provides firm pedalling support without giving up any plush compliance.


The Walkthrough

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 pound, 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
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.

Specifications

*spec applies to all sizes unless otherwise noted

Frameset
Frame Alpha Platinum Aluminium, tapered head tube, Knock Block, Control Freak internal routing, downtube guard, ISCG 05, magnesium rocker link, Mino Link, ABP, Boost148, 130 mm travel
Fork Fox Rhythm 34, Float EVOL air spring, GRIP damper, tapered steerer, 44 mm offset, Boost110, 15 mm Kabolt axle, 140 mm travel
*Shock Size: XS , S
Fox Performance Float EVOL, RE:aktiv 3-position damper, tuned by Trek Suspension Lab, 210x52.5 mm
Size: S , M , ML , L , XL , XXL
Fox Performance Float EVOL, RE:aktiv 3-position damper, tuned by Trek Suspension Lab, 210x55 mm
Front wheel Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15 mm thru axle
Rear wheel Bontrager Line Comp 30, Tubeless Ready, 6-bolt, 54T Rapid Drive, SRAM XD driver, Boost148, 12 mm thru axle
*Tyre 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"
Tyre part Bontrager TLR valve, 50 mm
Shifter SRAM GX Eagle, 12-speed
Rear derailleur SRAM GX Eagle
*Crank Size: XS , S
SRAM X1 Eagle, DUB, 30T steel ring, Boost, 170 mm length
Size: M , ML , L , XL , XXL
SRAM X1 Eagle, DUB, 30T steel ring, Boost, 175 mm length
Bottom bracket SRAM DUB, 92 mm, PressFit
Cassette SRAM Eagle XG-1275, 10-52, 12-speed
Chain SRAM GX Eagle, 12-speed
Saddle Bontrager Arvada, hollow chromoly rails, 138 mm width
*Seatpost Size: XS , S
Bontrager Line Dropper, 100 mm travel, internal routing, 31.6 mm, 345 mm length
Size: M , ML , L , XL , XXL
Bontrager Line Dropper, 150mm travel, internal routing, 31.6 mm, 440mm length
*Handlebar Size: XS , S
Bontrager Line, alloy, 35 mm, 27.5 mm rise, 750 mm width
Size: M , ML , L , XL , XXL
Bontrager Line, alloy, 35 mm, 27.5 mm rise, 780 mm width
*Stem Size: XS , S
Bontrager Line, 35 mm, Knock Block, 0-degree, 40 mm length
Size: M , ML , L , XL , XXL
Bontrager Line, 35 mm, Knock Block, 0-degree, 50 mm length
Head set Knock Block Integrated, 58-degree radius, cartridge bearing, 1-1/8" top, 1.5" bottom
Brake SRAM G2 R hydraulic disc
*Brake rotor Size: XS , S , M , ML , L , XL , XXL
SRAM CenterLine, 6-bolt, round-edge, 180mm
Size: M , ML , L , XL , XXL
SRAM CenterLine, 6-bolt, round-edge, 200mm


Sizing & fit

Proper bike fit is essential for best performance and comfort. Any size and geometry measurements shown on trekbikes.com are for general comparison purposes only. To find your perfect fit, visit an authorised Trek retailer, where an expert skilled at sizing will help you find the appropriate bike and size for your individual needs.

 

Rider Height

Inseam

All measurements provided in cm unless otherwise stated.

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
Bike and frame weights are based on Trek pre-production painted frames at the time of publication. Weights may vary in final production