MountainVerified spec

2021 Trek Fuel EX 9.9 X01 AXS Gen 5

Launched at $8,500

Own a 2021 Trek Fuel EX 9.9 X01 AXS Gen 5?

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What a used one is worth

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New

$4,750

$3,067 to $5,723

Like new

$4,512

$2,914 to $5,436

Excellent

$4,275

$2,761 to $5,150

Good

$3,562

$2,300 to $4,292

Fair

$2,612

$1,687 to $3,147

For parts

$1,425

$920 to $1,717

From the launch price, aged to 2026 and adjusted for condition. Guidance from our catalog, not an appraisal.

Overview

Brand: Trek
Model family: Fuel EX
Model year: 2021
Category: Mountain · trail
Frame material: carbon
Sizes: XS, S, M, ML, L, XL
Wheel size: 29/27.5
Wheel setup: either
Launch MSRP (US): $8,500

Drivetrain

Speeds: 12
Groupset: SRAM X01 Eagle AXS
Electronic: true

Build

Fork: Fox Factory 36, Float EVOL air spring, GRIP2 damper, tapered steerer, 44mm offset, Boost110, 15mm Kabolt axle, 140mm travel
Stem: Bontrager Line Pro, 35mm, Blendr compatible, 0 degree, 35mm length (XS/S); Bontrager Line Pro, 35mm, Blendr compatible, 0 degree, 45mm length (M/ML/L/XL)
Tires: Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120tpi, 27.5x2.40'' (XS/S); Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120 tpi, 27.5x2.60'' (XS/S); Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120tpi, 29x2.40'' (S/M/ML/L/XL); Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120 tpi, 29x2.60'' (S/M/ML/L/XL)
Brakes: SRAM G2 Ultimate hydraulic disc, carbon levers
Saddle: Bontrager Arvada, austenite rails, 138mm width
Wheels: Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, Rapid Drive 108, 6-bolt, SRAM XD driver, Boost148, 12mm thru axle, 27.5'' (XS/S); Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, Rapid Drive 108, 6-bolt, SRAM XD driver, Boost148, 12mm thru axle, 29'' (S/M/ML/L/XL); Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle, 27.5'' (XS/S); Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle, 29'' (S/M/ML/L/XL)
Cassette: SRAM XG-1295 Eagle, 10-52, 12 speed (XS/S/M/ML/L/XL); SRAM XX1 Eagle, 12 speed (XS/S/M/ML/L/XL)
Crankset: SRAM X01 Eagle carbon, DUB, 30T alloy ring, Boost (52mm chainline), 170mm length (XS/S); SRAM X01 Eagle carbon, DUB, 30T alloy ring, Boost (52mm chainline), 175mm length (M/ML/L/XL)
Seatpost: RockShox Reverb AXS, 100mm travel, wireless, 31.6mm, 340mm length (XS/S); RockShox Reverb AXS, 150mm travel, wireless, 31.6mm, 440mm length (M/ML); RockShox Reverb AXS, 170mm travel, wireless, 31.6mm, 480mm length (L/XL)
Shifters: SRAM Eagle AXS, wireless, 12 speed
Handlebar: Bontrager Line Pro, OCLV Carbon, 35mm, 27.5mm rise, 780mm width
Weight kg: 12.77
Rear shock: Fox Factory Float EVOL, RE:aktiv with Thru Shaft 3-position damper, Kashima Coat, tuned by Trek Suspension Lab, 210x52.5mm (XS/S); Fox Factory Float EVOL, RE:aktiv with Thru Shaft 3-position damper, Kashima Coat, tuned by Trek Suspension Lab, 210x55mm (S/M/ML/L/XL)
Travel rear mm: 130
Rear derailleur: SRAM X01 Eagle AXS
Travel front mm: 140

Geometry

L: Reach mm: 470; Stack mm: 613; Head angle deg: 66
M: Reach mm: 440; Stack mm: 609; Head angle deg: 66
S: Reach mm: 415; Stack mm: 572; Head angle deg: 66
ML: Reach mm: 455; Stack mm: 613; Head angle deg: 66
XL: Reach mm: 495; Stack mm: 627; Head angle deg: 66
XS: Reach mm: 395; Stack mm: 563; Head angle deg: 66

Price as shown on Trek's US site, 2020-08 capture. Geometry figures from the low position of the adjustable Mino Link. Smaller frame sizes run the smaller wheel size. Sold across model years 2021-2022.

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