Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Trek
2021 Trek FX Sport Carbon 4
Value Guide market data · 2021 Trek FX Sport Carbon 4
12-month trend
12%
Direction and magnitude, not judgment
vs. category average
— %
No category comparison available
Price over time - 2021 Trek FX Sport Carbon 4
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All FX model years
2026$791 - $918▼ 61% vs. 2021
2025$2,790 - $3,240▲ 36% vs. 2021
2024$2,604 - $3,024▲ 27% vs. 2021
2023$2,604 - $3,024▲ 27% vs. 2021
2022$2,604 - $3,024▲ 27% vs. 2021
2021$2,046 - $2,376Currently viewing
2020$2,046 - $2,3760% vs. 2021
2019$1,953 - $2,268▼ 5% vs. 2021
2018$1,860 - $2,160▼ 9% vs. 2021
2017$1,953 - $2,268▼ 5% vs. 2021
2013$409 - $475▼ 80% vs. 2021
2012$2,372 - $2,754▲ 16% vs. 2021
2011$2,492 - $2,894▲ 22% vs. 2021
2010$2,492 - $2,894▲ 22% vs. 20212021 FX Sport Carbon 4 lineup
Overview
About this bike
2021 Trek FX Sport Carbon 4 value depends on condition, original build, frame material, service history, and current buyer demand.
Specifications
Frameset
- Fork
- FX Carbon, threadless alloy steerer, hidden fender mounts, flat mount disc, 405mm axle-to-crown, 100x12mm thru axle
- Frame
- 400 series OCLV carbon, IsoSpeed, internal routing, 3s chain keeper, DuoTrap S compatible, fender mounts, flat mount disc, 142x12mm thru axle
Drivetrain
- Groupset
- 2021 Trek FX Sport Carbon 4
- Crankset
- Shimano GRX RX600
- Bottom Bracket
- Shimano BB71, 86.5mm, PressFit
- Chain
- Shimano HG601
- Rear Derailleur
- Shimano GRX RX812, long cage, 42T max cog
- Cassette/Rear Cogs
- Shimano SLX M7000, 11-42T, 11 speed
- Chainrings
- 40T
- Shifters
- Shimano RS700, 11 speed
Brakes
- Brake Levers
- Shimano MT201 hydraulic disc
- Brakes
- Shimano MT201 hydraulic disc, flat mount, 160mm rotors
Cockpit
- Saddle
- Bontrager H1
- Headset
- 1-1/8" threadless, sealed cartridge bearings
- Stem
- Bontrager Elite, 31.8mm, Blendr compatible
- Handlebars
- Bontrager Satellite Plus IsoZone
- Seat Post
- Bontrager alloy, 27.2mm, 12mm offset, 330mm length
- Tape/Grips
- Bontrager Satellite IsoZone Plus, lock-on, ergonomic
Wheels & Tires
- Hubs
- Front: Formula alloy, Center Lock disc<br>Rear: Shimano RXC400, Center Lock, Shimano 11-speed freehub
- Tires
- Bontrager R1 Hard-Case Lite, wire bead, 60 tpi, 700x32c
- Axles
- Front: 100 x 12mm thru axle<br>Rear: 142 x 12mm thru axle
- Spokes
- 14g, stainless steel, black
Pedals
- Pedals
- Wellgo M141, resin body, alloy cage
Accessories
- Rims/Wheels
- Bontrager Tubeless Ready Disc, 32-hole, presta valve
- Color
- Dark Aquatic/Carbon Smoke / Quicksilver/Carbon Smoke
Weight & Sizing
- Size
- X-Small / Small / Medium / Large / X-Large
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.