Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Trek
2021 Trek Madone SLR 6
Value Guide market data · 2021 Trek Madone SLR 6
12-month trend
15%
Direction and magnitude, not judgment
vs. category average
— %
No category comparison available
Price over time - 2021 Trek Madone SLR 6
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All Madone model years
2026$13,346 - $15,498▲ 15% vs. 2021
2025$13,811 - $16,038▲ 19% vs. 2021
2024$11,858 - $13,770▲ 2% vs. 2021
2023$11,858 - $13,770▲ 2% vs. 2021
2022$10,230 - $11,880▼ 12% vs. 2021
2021$11,625 - $13,500Currently viewing
2020$11,625 - $13,5000% vs. 2021
2019$11,439 - $13,284▼ 2% vs. 2021
2018$11,625 - $13,5000% vs. 2021
2017$12,090 - $14,040▲ 4% vs. 2021
2016$12,090 - $14,040▲ 4% vs. 2021
2015$10,742 - $12,474▼ 8% vs. 2021
2014$10,742 - $12,474▼ 8% vs. 2021
2013$10,742 - $12,474▼ 8% vs. 2021
2012$10,869 - $12,622▼ 7% vs. 2021
2011$8,100 - $9,407▼ 30% vs. 2021
2010$8,007 - $9,299▼ 31% vs. 2021
2009$8,491 - $9,860▼ 27% vs. 2021
2008$7,673 - $8,910▼ 34% vs. 2021
2007$6,975 - $8,100▼ 40% vs. 2021
2006$9,300 - $10,800▼ 20% vs. 2021
2005$7,161 - $8,316▼ 38% vs. 20212021 Madone SLR 6 lineup
Overview
About this bike
2021 Trek Madone SLR 6 value depends on condition, original build, frame material, service history, and current buyer demand.
Specifications
Frameset
- Fork
- Madone KVF full carbon, tapered carbon steerer, invisible cable routing, flat mount disc, carbon dropouts, 12 x 100mm thru axle
- Frame
- 800 Series OCLV Carbon, KVF (Kammtail Virtual Foil) tube shape, adjustable top tube IsoSpeed, invisible cable routing, 3S aero chain keeper, T47 BB, DuoTrap S compatible, flat mount disc, 142 x 12mm thru axle
Drivetrain
- Groupset
- 2021 Trek Madone SLR 6
- Crankset
- Shimano Ultegra R8000
- Bottom Bracket
- Praxis, T47 threaded, internal bearing
- Chain
- Shimano Ultegra HG701, 11-speed
- Front Derailleur
- Shimano Ultegra R8000, braze-on
- Rear Derailleur
- Shimano Ultegra R8000, short cage, 30T max cog
- Cassette/Rear Cogs
- Shimano Ultegra R8000, 11-30, 11 speed
- Chainrings
- 52/36T
- Shifters
- Shimano Ultegra R8020, 11-speed
Brakes
- Brakes
- Shimano Ultegra hydraulic disc, flat mount w/Shimano RT800, 160mm, Center Lock
Cockpit
- Saddle
- Bontrager Aeolus Elite, austenite rails, 145mm width
- Stem
- Trek Madone aero, invisible cable routing, 7 degree
- Handlebars
- Trek Madone adjustable aero VR-CF, OCLV Carbon, invisible cable routing, 93mm reach, 123mm drop
- Seat Post
- Madone aero carbon internal seatmast cap, integrated light mount, 25mm offset
- Tape/Grips
- Bontrager Supertack Perf tape
Wheels & Tires
- Tires
- Bontrager R3 Hard-Case Lite, aramid bead, 120 tpi, 700 x 25c
- Axles
- Front: 100 x 12mm<br>Rear: 142 x 12mm
Accessories
- Rims/Wheels
- Bontrager Aeolus Pro 5, OCLV Carbon, Tubeless Ready, 19.5mm rim width, 50mm rim depth
- Color
- Navy Carbon Smoke/Blue / Navy Carbon Smoke/Viper Red / Matte Onyx Carbon
Weight & Sizing
- Size
- 47cm / 50cm / 52cm / 54cm / 56cm / 58cm / 60cm / 62cm
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
Carbon inspection
Tap test the frame, fork, seatpost, and bars for cracks; verify no impact damage near dropouts.
Inspection
Brake hoses & cables
Check hydraulic line bleed, cable housing wear, and confirm rotors are within spec.