Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Trek
2021 Trek Fuel EX 9.9 X01
Value Guide market data · 2021 Trek Fuel EX 9.9 X01
12-month trend
13%
Direction and magnitude, not judgment
vs. category average
3%
Drops faster than category avg
Price over time - 2021 Trek Fuel EX 9.9 X01
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All Fuel model years
2026$3,720 - $4,320▼ 62% vs. 2021
2025$10,230 - $11,880▲ 4% vs. 2021
2024$11,625 - $13,500▲ 18% vs. 2021
2023$13,020 - $15,120▲ 33% vs. 2021
2022$8,882 - $10,314▼ 9% vs. 2021
2021$9,812 - $11,394Currently viewing
2020$7,905 - $9,180▼ 19% vs. 2021
2019$7,254 - $8,424▼ 26% vs. 2021
2018$8,277 - $9,612▼ 16% vs. 2021
2017$7,812 - $9,072▼ 20% vs. 2021
2016$7,812 - $9,072▼ 20% vs. 2021
2015$8,789 - $10,206▼ 10% vs. 2021
2014$7,719 - $8,964▼ 21% vs. 2021
2013$7,812 - $9,072▼ 20% vs. 2021
2012$8,686 - $10,087▼ 11% vs. 2021
2011$7,319 - $8,500▼ 25% vs. 2021
2010$6,343 - $7,366▼ 35% vs. 2021
2009$6,650 - $7,722▼ 32% vs. 2021
2008$5,729 - $6,653▼ 42% vs. 2021
2007$1,581 - $1,836▼ 84% vs. 2021
2006$1,953 - $2,268▼ 80% vs. 2021
2005$2,353 - $2,732▼ 76% vs. 2021
2004$4,464 - $5,184▼ 55% vs. 2021
2003$4,092 - $4,752▼ 58% vs. 2021
2002$3,069 - $3,564▼ 69% vs. 2021
2001$2,744 - $3,186▼ 72% vs. 20212021 Fuel EX 9.9 X01 lineup
Overview
About this bike
2021 Trek Fuel EX 9.9 X01 value depends on condition, original build, frame material, service history, and current buyer demand.
Specifications
Frameset
- Fork
- Fox Factory 36, Float EVOL air spring, GRIP2 damper, tapered steerer, 44mm offset, 15mm Kabolt axle, 140mm travel
- Frame
- OCLV 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, 130mm travel
- Rear Shock
- Fox Factory Float EVOL, RE:aktiv with Thru Shaft 3-position damper, Kashima Coat, tuned by Trek Suspension Lab; XS – S: 210x52.5mm / M – XL: 210x55mm
Drivetrain
- Groupset
- SRAM X01
- Bottom Bracket
- SRAM DUB, 92mm, PressFit
- Cassette
- SRAM Eagle XG-1275, 10-52, 12 speed
- Chain
- SRAM GX Eagle, 12 speed
- Chainrings
- 30T alloy ring
- Crankset
- SRAM X01 Eagle carbon, DUB, Boost (52mm chainline)
- Rear Derailleur
- SRAM X01 Eagle
- Shifters
- SRAM X01 Eagle, 12 speed
Brakes
- Brakes
- SRAM G2 RSC 4-piston hydraulic disc w/SRAM CenterLine, 6-bolt, round-edge rotors
Cockpit
- Handlebar
- Bontrager Line Pro, OCLV Carbon, 35mm, 27.5mm rise, 780mm width
- Headset
- Knock Block Integrated, 58-degree radius, cartridge bearing, 1-1/8'' top, 1.5'' bottom
- Saddle
- Bontrager Arvada Pro, carbon rails, 138mm width
- Seatpost
- Bontrager Line Elite Dropper, 100mm travel, internal routing, 31.6mm; XS – S: 100mm travel / M – ML: 150mm travel / L – XL: 170mm travel
- Stem
- Bontrager Line Pro, 35mm, Knock Block, Blendr compatible, 0 degree
- Grips
- Bontrager XR Trail Elite, alloy lock-on
Wheels & Tires
- Axles
- Front: 110 x 15mm thru-axle, Rear: 148 x 12mm thru-axle
- Front Tire
- Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewall, aramid bead, 120 TPI, 2.60 / 2.40"
- Rims
- Bontrager Line Elite 30, OCLV Mountain Carbon, Tubeless Ready, Rapid Drive 108, 6-bolt, SRAM XD driver
- Wheel Size
- 27.5-inch / 29-inch
Pedals
- Pedals
- Sold separately
Accessories
- Accessories & Extras
- Bontrager BITS Internal Frame Storage Bag
Frame sizing
XS4'10"-5'2"
S5'2"-5'6"
M5'6"-5'10"
L5'10"-6'2"
XL6'2"-6'6"
M highlighted as most common resale size. Sourced from catalog metadata.
Geometry
- Stack
- Varies by size
- Reach
- Varies by size
- Wheelbase
- Varies by size
Industry standard. Sourced from catalog metadata.
What to check when buying used
Inspection
Drivetrain wear
Check chain stretch, cassette teeth, chainrings, and shifting under load before negotiating price.
Inspection
Wheel condition
Inspect rims, hubs, spokes, and bearing play; ask about the tire age and any prior wheel rebuilds.
Inspection
Service history
Ask for service records covering bearings, brakes, drivetrain, and any frame or fork warranty work.
Inspection
Suspension service
Confirm fork lowers and rear shock service intervals; ask for the most recent service receipts.
Inspection
Frame pivots & bearings
Cycle the suspension off the bike to feel for play, grit, or noise in pivot bearings.