Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Trek
2021 Trek Fuel EX 8 Gen 5
Value Guide market data · 2021 Trek Fuel EX 8 Gen 5
12-month trend
11%
Direction and magnitude, not judgment
vs. category average
7%
Holds value better than category avg
Price over time - 2021 Trek Fuel EX 8 Gen 5
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 8 Gen 5 lineup
Overview
About this bike
2021 Trek Fuel EX 8 Gen 5 value depends on condition, original build, frame material, service history, and current buyer demand.
Specifications
Frameset
- Fork
- Fox Rhythm 34, Float EVOL air spring, GRIP damper, tapered steerer, 44mm offset, Boost110, 15mm Kabolt axle, 140mm travel
- Frame
- Alpha Platinum Aluminum, tapered head tube, Knock Block, Control Freak internal routing, downtube guard, ISCG 05, magnesium rocker link, Mino Link, ABP, Boost148, 130mm travel
- Rear Shock
- Fox Performance Float EVOL, RE:aktiv 3-position damper, tuned by Trek Suspension Lab
Drivetrain
- Groupset
- Shimano XT
- Bottom Bracket
- Shimano MT500, 92mm, PressFit
- Cassette
- Shimano XT M8100, 10-51, 12 speed
- Chain
- Shimano SLX M7100, 12 speed
- Chainrings
- 30T
- Crankset
- Shimano SLX M7100, Boost (52mm chainline), 170/75mm length
- Rear Derailleur
- Shimano XT M8100, long cage, 51T max cog
- Shifters
- Shimano XT M8100, 12 speed
Brakes
- Brake Levers
- MT4100
- Brakes
- Front: Shimano 4-piston hydraulic disc, MT420 caliper, Rear: Shimano hydraulic disc, MT420 4-piston caliper
Cockpit
- Handlebars
- Bontrager Line, alloy, 35mm, 27.5mm rise, 750/780mm width
- Headset
- Knock Block Integrated, 58-degree radius, cartridge bearing, 1-1/8'' top, 1.5'' bottom
- Saddle
- Bontrager Arvada, hollow chromoly rails, 138mm width
- Seatpost
- Bontrager Line Dropper, 100/150mm travel, internal routing, 31.6mm, 345/440mm length
- Stem
- Bontrager Line, 35mm, Knock Block, 0 degree, 40/50mm length
Wheels & Tires
- Axles
- Front: Boost 110 x 15mm thru-axle, Rear: Boost 148 x 12mm thru-axle
- Rims
- Bontrager Line Comp 30, Tubeless Ready, 6-bolt
- Tires
- Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, Bontrager TLR valve, 50mm
- Wheel Size
- 27.5-inch / 29-inch
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.