2021 Trek Fuel EX 8 GX

The 2021 Trek Fuel EX 8 GX is a 27.5″ / 29″ aluminum frame full suspension trail bike with high-end components.

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2021 Trek Fuel EX 8 GX
  • MSRP $3,799
  • Weight 30.4 lbs / 13.8 kg
  • Front Travel 140mm
  • Rear Travel 130mm
  • Frame Aluminum
  • Fork Fox Rhythm Float 34
  • Wheels 27.5″ / 29″
  • Drivetrain 1 × 12
  • Groupset GX Eagle, X1
  • Brakes Hydraulic Disc
  • Seatpost Dropper post
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Gearing

1 × 12 — 12 speed

2021 Trek Fuel EX 8 GX
26 mph
Similar Bikes
26 mph

The Fuel EX 8 GX is easier to ride up hills than similar bikes.

The Fuel EX 8 GX is geared about the same as similar bikes for riding downhill.


Estimated Spec Level

Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more. Learn more

Spec level →$0$500$1,000$1,500$2,000$2,500$3,000$3,500
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Geometry

Specs
Build
FrameAlpha Platinum Aluminum, tapered head tube, Knock Block, Control Freak internal routing, downtube guard, ISCG 05, magnesium rocker link, Mino Link, ABP, Boost148, 130mm travel
ForkFox Rhythm 34, Float EVOL air spring, GRIP damper, tapered steerer, 44mm offset, Boost110, 15mm Kabolt axle, 140mm travel
Rear ShockSize: XS, S, Fox Performance Float EVOL, 3-position RE:aktiv damper, tuned by Trek Suspension Lab, 210mm x 52.5mm; Size: S, M, ML, L, XL, XXL, Fox Performance Float EVOL, 3-position RE:aktiv damper, tuned by Trek Suspension Lab, 210mm x 55mm
Bottom BracketSRAM DUB, 92mm, PressFit
HeadsetKnock Block Integrated, 58-degree radius, cartridge bearing, 1-1/8'' top, 1.5'' bottom
StemSize: 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
HandlebarSize: 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
SaddleBontrager Arvada, hollow chromoly rails, 138mm width
SeatpostSize: 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
GripsBontrager XR Trail Elite, nylon lock-on
Groupset
Rear DerailleurSRAM GX Eagle
CrankSize: XS, S, SRAM X1 Eagle, DUB, 30T steel ring, Boost (52mm chainline), 170mm length; Size: M, ML, L, XL, XXL, SRAM X1 Eagle, DUB, 30T steel ring, Boost (52mm chainline), 175mm length
ShiftersSRAM GX Eagle, 12 speed
CassetteSRAM Eagle XG-1275, 10-52, 12 speed
ChainSRAM GX Eagle, 12 speed
BrakesSRAM G2 R 4-piston hydraulic disc
Wheels
RimsBontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle
Front HubBontrager alloy, sealed bearing, alloy axle, 6-bolt, Boost110, 15 mm thru axle
TiresSize: 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''
Disk RotorsSize: 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
2021 Trek Fuel EX 8 GX
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