2021 Trek
Checkpoint ALR 4
An aluminum frame gravel bike with mid-range components and hydraulic disc brakes.
Compare the full range
Manufacturer Price
$1,699| Weight | 22.6 lbs |
|---|---|
| Frame | Aluminum |
| Suspension | Rigid |
| Fork | Carbon |
| Wheels | 700c Aluminum |
| Drivetrain | 2 × 10 |
| Groupset | GRX 400, GRX 600 |
| Brakes | Hydraulic Disc |
For This Bike
Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more.
Compare the full Checkpoint model range
View Comparison5'1" – 5'5"
5'3" – 5'7"
5'5" – 5'9"
5'8" – 6'0"
5'10" – 6'2"
6'0" – 6'4"
Oct 2022 · Mat Brett
Get all the details of this fiery red gravel/adventure bike with Trek’s gravel-smoothing IsoSpeed
Sep 2022 · Josh Ross
The Trek Checkpoint is the only bike you need to take you on every adventure
SRAM Rival AXS is the perfect groupset for an all-arounder
Mud-guard mounts
Mounting points for every bag you can think of
Non-proprietary seat-post provides options
Internal storage is convenient
Downtube protection eases worry
Threaded bottom bracket
Ideal all-around gearing
Short stem for added stability means handlebar/knee interference
Lacks included protection for the chain stay
Detail behind the fork steerer collects water and is difficult to clean
Sep 2022 · Steve Williams
Trek's updated aluminum Checkpoint is a surefooted, confidence-inspiring ride that's perfect for ruined back lanes, byways and well-laden travels
Stable and predictable
Comfortable
Great shifting and brakes
Gearing a bit tall for the weight
Could use a dropper post
Aug 2022 · Sam Challis
Neat tricks combined with smart design equals good fun. The Checkpoint SL is the sweetspot in Trek's gravel range
Effective geometry
Sensible spec
Neat extra frame features
Comfortable
Heavy
Non-removable front derailleur mount
Headset cable integration design isn’t watertight
Sep 2021
Updated geometry and differentiated models for speed, adventure, and all purpose riding
Sep 2021 · Matthew Pioro
Also, a tour of the revamped Trek Checkpoint lineup of bikes and Adventure bags for mixed-surface adventures
Sep 2021 · Ben Delaney
New 8-bike line ranges from aluminum $2,399 ALR 5 to $11,999 SLR 9 eTap with elastomer-damped Isospeed, internal routing, and down tube storage.
Dec 2020 · Benjamin Topf
Trek includes adjustable chainstays on their Checkpoint SL 7 gravel bike and offers new options for future gravel adventures like single-speed builds.
King of the climbs
Quick acceleration
Consistent spec
Many mounting points
Undamped rear flex
Limited adjustment range of the seatmast cap
Tires need more support at high speeds
| Frame | 300 Series Alpha Aluminum, tapered head tube, Control Freak internal routing, 3S chain keeper, rack and fender mounts, flat mount disc, horizontal sliding dropouts, 142x12mm thru axle BB Standard: BB86/BB92, Press Fit Tire Clearance: 45c Colors: Rage Red; Dark Aquatic |
|---|---|
| Fork | Checkpoint carbon, tapered alloy steerer, rack mounts, fender mounts, flat mount disc, 12x100mm thru axle |
| Bottom Bracket | Shimano RS500, 86mm, PressFit |
| Headset | FSA Integrated, sealed cartridge bearing, 1-1/8'' top, 1.5'' bottom |
| Stem | Size: 49, Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 80mm length; Size: 52, 54, Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 90mm length; Size: 56, 58, Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 100mm length; Size: 61, Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 110mm length |
| Handlebar | Size: 49, Bontrager Elite IsoZone VR-CF, alloy, 31.8mm, 93mm reach, 123mm drop, 38cm width; Size: 52, Bontrager Elite IsoZone VR-CF, alloy, 31.8mm, 93mm reach, 123mm drop, 40cm width; Size: 54, 56, Bontrager Elite IsoZone VR-CF, alloy, 31.8mm, 93mm reach, 123mm drop, 42cm width; Size: 58, 61, Bontrager Elite IsoZone VR-CF, alloy, 31.8mm, 93mm reach, 123mm drop, 44cm width |
| Saddle | Bontrager Montrose Comp, steel rails, 138mm width |
| Seatpost | Bontrager Comp, 6061 alloy, 27.2mm, 8mm offset, 330mm length Type: Rigid |
| Rear Derailleur | Shimano GRX RX400, long cage, 36T max cog |
|---|---|
| Front Derailleur | Shimano GRX RX400, braze-on |
| Crank | Size: 49, Shimano GRX RX600, 46/30, 165mm length; Size: 52, Shimano GRX RX600, 46/30, 170mm length; Size: 54, 56, Shimano GRX RX600, 46/30, 172.5mm length; Size: 58, 61, Shimano GRX RX600, 46/30, 175mm length |
| Shifters | Shimano GRX RX400, 10 speed |
| Cassette | Shimano Tiagra HG500, 11-34, 10 speed |
| Chain | KMC X10 |
| Brakes | Shimano RX400 hydraulic disc, flat mount Type: Hydraulic Disc |
| Rims | Bontrager Tubeless Ready, 28-hole, 17mm width, presta valve |
|---|---|
| Spokes | 14g stainless steel |
| Front Hub | Bontrager alloy, sealed bearing, centerlock disc, 100x12mm thru axle |
| Rear Hub | Bontrager alloy, sealed bearing, centerlock disc, Shimano 11-speed freehub, 142x12mm thru axle |
| Tires | Bontrager GR1 Comp, wire bead, 60 tpi, 700x40c |
| Disc Rotors | Shimano SM-RT70, centerlock, 160mm |
Last updated April 20