Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Trek
2021 Trek Checkpoint SL 6
Estimated used market value
$1,805 - $1,857
Actual value depends on condition, size, and local demand.
Value Guide market data · 2021 Trek Checkpoint SL 6
12-month projected trend
14%
Direction and magnitude, not judgment
vs. category average
1%
Holds value better than category avg
Price over time - 2021 Trek Checkpoint SL 6
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All Checkpoint model years
Compare Checkpoint SL 6 models
1 modelsChoose a different build or frame style to see its value.
Overview
About this bike
Checkpoint SL 6 is a carbon gravel bike without limits. It's designed to take you places you'd never reach on a standard road bike—like the mud-caked finish line of the world's greatest gravel races. A lightweight OCLV Carbon frame with gravel-smoothing IsoSpeed, a Shimano GRX drivetrain, and extra mounts for gear and accessories make this bike a true gravel powerhouse and a great choice for serious all-road adventurers. It's right for you if... - You have big dreams for the likes of Dirty Kanza, Land Run 100, and Trans Iowa, and know you'll need the most dialed gravel bike for these epic adventures. You also love the idea of one bike with such incredible versatility that it excels at gravel racing, adventure road riding, bikepacking, and whatever kind of ride you feel like tackling next. The tech you get - A 500 Series OCLV Carbon frame with Rear IsoSpeed, a Shimano GRX drivetrain with a wide-range cassette, powerful hydraulic disc brakes, Bontrager Paradigm Comp Disc wheels with 25mm inner width rims and wide 700x40c gravel tires that provide extra traction and stability, and a vibration-absorbing handlebar. The final word - A carbon gravel bike built for the longest days, roughest roads, and biggest adventures. It's light, fast, comfortable, and spec'd with parts that stand up to the most rugged terrain. Why you'll love it - The IsoSpeed decoupler cuts down on fatiguing bumps in gravel so you can wander more, reach new places, and stay stronger longer - This bike is exceedingly versatile and suited to a wide variety of ride styles, including gravel rides, bikepacking, and daily commutes - Extra mounts on the top tube, seat tube, and both sides of the down tube make it easy to carry extra gear and water - Massive tire clearance means you can use tires up to 45c for extra traction and stability in any conditions - The horizontal sliding dropout makes it easy to fine-tune your geometry or run singlespeed
Specifications
- Subtype
- Gravel
- Category
- Road
- Component Fork
- Checkpoint carbon, tapered carbon steerer, rack mounts, fender mounts, flat mount disc, 12x100mm thru axle
- Component Size
- 49cm, 52cm, 54cm, 56cm, 58cm, 61cm
- Component Stem
- Bontrager Pro, 31.8mm, Blendr compatible, 7 degree
- Product Family
- Checkpoint
- Component Chain
- Shimano Ultegra HG701, 11-speed
- Component Color
- Carbon Blue Smoke
- Component Frame
- 500 Series OCLV Carbon, IsoSpeed, tapered head tube, Control Freak internal routing, 3S chain keeper, rack and fender mounts, flat mount disc, horizontal sliding dropouts, 142x12mm thru axle
- Component Brakes
- Shimano RX810 hydraulic disc, flat mount
- Component Saddle
- Bontrager Arvada Comp, steel rails, 138mm width
- Component Headset
- FSA Integrated, sealed cartridge bearing, 1-1/8'' top, 1.5'' bottom
- Component Cassette
- Shimano Ultegra HG800-11, 11-34, 11 speed
- Component Crankset
- Shimano GRX RX810, 48/31
- Component Shifters
- Shimano GRX RX810, 11 speed
- Component Handlebar
- Bontrager Elite IsoZone VR-CF, alloy, 31.8mm, 93mm reach, 123mm drop
- Component Seat Post
- Bontrager carbon seatmast cap, 20mm offset
- Component Front Tire
- Bontrager GR1 Team Issue, Tubeless Ready, Inner Strength casing, aramid bead, 120 tpi, 700x40c
- Component Tape Grips
- Bontrager Supertack Perf tape
- Component Bottom Bracket
- Trek BB90
- Component Rear Derailleur
- Shimano GRX RX810, long cage, 34T max cog
- Component Front Derailleur
- Shimano GRX RX810, braze-on
- Crankset
- Shimano GRX RX810, 48/31
- Bottom Bracket
- Trek BB90
- Chain
- Shimano Ultegra HG701, 11-speed
- Saddle
- Bontrager Arvada Comp, steel rails, 138mm width
- Handlebar
- Bontrager Elite IsoZone VR-CF, alloy, 31.8mm, 93mm reach, 123mm drop
- Headset
- FSA Integrated, sealed cartridge bearing, 1-1/8'' top, 1.5'' bottom
- Front Derailleur
- Shimano GRX RX810, braze-on
- Rear Derailleur
- Shimano GRX RX810, long cage, 34T max cog
- Stem
- Bontrager Pro, 31.8mm, Blendr compatible, 7 degree
- Brakes
- Shimano RX810 hydraulic disc, flat mount
- Cassette
- Shimano Ultegra HG800-11, 11-34, 11 speed
- Fork
- Checkpoint carbon, tapered carbon steerer, rack mounts, fender mounts, flat mount disc, 12x100mm thru axle
- Frame
- 500 Series OCLV Carbon, IsoSpeed, tapered head tube, Control Freak internal routing, 3S chain keeper, rack and fender mounts, flat mount disc, horizontal sliding dropouts, 142x12mm thru axle
- Seat Post
- Bontrager carbon seatmast cap, 20mm offset
- Shifters
- Shimano GRX RX810, 11 speed
- Tape/Grips
- Bontrager Supertack Perf tape
- Color
- Carbon Blue Smoke
- Size
- 61cm
- Front Tire
- Bontrager GR1 Team Issue, Tubeless Ready, Inner Strength casing, aramid bead, 120 tpi, 700x40c
What to check when buying used
Inspection
Drivetrain wear
Check chain stretch, cassette teeth, chainrings, and shifting under load before negotiating price.
Inspection
Service history
Ask for service records covering bearings, brakes, drivetrain, and any frame or fork warranty work.