MountainVerified spec

2021 Trek Fuel EX 8 GX

Launched at $3,500

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What a used one is worth

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New

$1,956

$1,263 to $2,356

Like new

$1,858

$1,200 to $2,239

Excellent

$1,760

$1,137 to $2,121

Good

$1,467

$947 to $1,767

Fair

$1,076

$695 to $1,296

For parts

$587

$379 to $707

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: aluminum
Sizes: XS, S, M, ML, L, XL, XXL
Wheel size: 29/27.5
Wheel setup: either
Launch MSRP (US): $3,500

Drivetrain

Speeds: 12
Groupset: SRAM GX Eagle
Electronic: false

Build

Fork: Fox Rhythm 34, Float EVOL air spring, GRIP damper, tapered steerer, 44mm offset, Boost110, 15mm Kabolt axle, 140mm travel
Stem: Bontrager Line, 35mm, 0 degree, 40mm length (XS/S); Bontrager Line, 35mm, 0 degree, 50mm length (M/ML/L/XL/XXL)
Tires: 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, 27.5x2.40'' (XS/S); Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120tpi, 29x2.40'' (S/M/ML/L/XL/XXL); Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120 tpi, 29x2.60'' (S/M/ML/L/XL/XXL)
Brakes: SRAM G2 R 4-piston hydraulic disc
Saddle: Bontrager Arvada, hollow chromoly rails, 138mm width
Wheels: Bontrager Line Comp 30, Tubeless Ready, Rapid Drive 108, 6-bolt, Boost148, 12mm thru axle, 27.5'' (XS/S); Bontrager Line Comp 30, Tubeless Ready, Rapid Drive 108, 6-bolt, Boost148, 12mm thru axle, 29'' (S/M/ML/L/XL/XXL); Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle, 27.5'' (XS/S); Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle, 29'' (S/M/ML/L/XL/XXL)
Cassette: SRAM Eagle XG-1275, 10-52, 12 speed
Crankset: SRAM X1 Eagle, DUB, 30T steel ring, 52mm chainline, 170mm length (XS/S); SRAM X1 Eagle, DUB, 30T steel ring, 52mm chainline, 175mm length (M/ML/L/XL/XXL)
Seatpost: Bontrager Line Dropper, 100mm travel, internal routing, 31.6mm, 345mm length (XS/S); Bontrager Line Dropper, 150mm travel, internal routing, 31.6mm, 440mm length (M/ML/L/XL/XXL)
Shifters: SRAM GX Eagle, 12 speed
Handlebar: Bontrager Line, alloy, 35mm, 27.5mm rise, 750mm width (XS/S); Bontrager Line, alloy, 35mm, 27.5mm rise, 780mm width (M/ML/L/XL/XXL)
Weight kg: 13.78
Rear shock: Fox Performance Float EVOL, 3-position RE:aktiv damper, tuned by Trek Suspension Lab, 210mm x 52.5mm (XS/S); Fox Performance Float EVOL, 3-position RE:aktiv damper, tuned by Trek Suspension Lab, 210mm x 55mm (S/M/ML/L/XL/XXL)
Travel rear mm: 130
Rear derailleur: SRAM GX Eagle
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
XXL: Reach mm: 515; Stack mm: 645; Head angle deg: 66

Price as shown on Trek's US site, 2020-10 capture. Geometry figures from the low position of the adjustable Mino Link. Smaller frame sizes run the smaller wheel size.

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