2021 Trek Fuel EX 9.9 XO1

The 2021 Trek Fuel EX 9.9 XO1 is a 27.5″ / 29″ carbon frame full suspension trail bike with ultra high-end components.

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2021 Trek Fuel EX 9.9 XO1
  • MSRP $7,999
  • Weight 28.6 lbs / 13.0 kg
  • Suspension Full
  • Front Travel 140mm
  • Rear Travel 130mm
  • Frame Carbon
  • Fork Fox Factory Float 36
  • Wheels 27.5″ / 29″ Carbon
  • Drivetrain 1 × 12
  • Groupset X01 Eagle
  • Brakes Hydraulic Disc
  • Seatpost Dropper post

Where to Buy

Gearing

1 × 12 — 12 speed

2021 Trek Fuel EX 9.9 XO1
25 mph
Similar Bikes
26 mph

The Fuel EX 9.9 XO1 is easier to ride up hills than similar bikes.

The Fuel EX 9.9 XO1 won‘t keep up with similar bikes while riding downhill or sprinting.


Estimated Spec Level

Estimated spec level of the Fuel EX 9.9 XO1 compared to other trail bikes. 99 Spokes analyzes the build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more to estimate the overall spec level of each bike.

Learn more

est. spec level →$0$2,000$4,000$6,000$8,000
This bike
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Reviews

Geometry

Specs
Build
FrameOCLV Mountain Carbon main frame & stays, internal storage, tapered head tube, Knock Block, Control Freak internal routing, Carbon Armor, ISCG 05, magnesium rocker link, Mino Link, ABP, Boost148, 130mm travel
ForkFox Factory 36, Float EVOL air spring, GRIP2 damper, tapered steerer, 44mm offset, Boost110, 15mm Kabolt axle, 140mm travel
Rear ShockFox Factory Float EVOL, RE:aktiv with Thru Shaft 3-position damper, Kashima Coat, tuned by Trek Suspension Lab, 210x52.5mm
Bottom BracketSRAM DUB, 92mm, PressFit
HeadsetKnock Block Integrated, 58-degree radius, cartridge bearing, 1-1/8'' top, 1.5'' bottom
StemBontrager Line Pro, 35mm, Knock Block, Blendr compatible, 0 degree, 45mm length
HandlebarBontrager Line Pro, OCLV Carbon, 35mm, 27.5mm rise, 780mm width
SaddleBontrager Arvada Pro, carbon rails, 138mm width
SeatpostBontrager Line Elite Dropper, 170mm travel, internal routing, 31.6mm, 480mm length
GripsBontrager XR Trail Elite, alloy lock-on
Groupset
Rear DerailleurSRAM X01 Eagle
CrankSRAM X01 Eagle carbon, DUB, 30T alloy ring, Boost (52mm chainline), 175mm length
ShiftersSRAM X01 Eagle, 12 speed
CassetteSRAM Eagle XG-1275, 10-52, 12 speed
ChainSRAM GX Eagle, 12 speed
BrakesSRAM G2 RSC 4-piston hydraulic disc
Wheels
RimsNEW Bontrager Line Elite 30, OCLV Mountain Carbon, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle
TiresBontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120 tpi, 27.5x2.60''
Disk RotorsSRAM CenterLine, 6-bolt, round-edge, 200mm
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