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2021 Trek Checkpoint ALR 4

An aluminum frame gravel bike with mid-range components and hydraulic disc brakes, priced at the low end of the Checkpoint model range. Compare the full range

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2021 Trek Checkpoint ALR 4
MSRP$1,699
Weight22.6 lbs / 10.3 kg
FrameAluminum
ForkCarbon
Wheels700c
Tires40c
Tire Clearance45c
Drivetrain2 × 10
GroupsetGRX 400, GRX 600
BrakesHydraulic Disc
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Gearing

2 × 10 — 20 speed

2021 Trek Checkpoint ALR 4
36 mph
Similar Bikes
36 mph

The Checkpoint ALR 4 is easier to ride up hills than similar bikes.

The Checkpoint ALR 4 is geared about the same as similar bikes for riding downhill.

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Estimated Spec Level

Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more. Learn more

Spec level →$0$200$400$600$800$1,000$1,200$1,400$1,600
This bike
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Geometry
Specs
Build
Frame300 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
ForkCheckpoint carbon, tapered alloy steerer, rack mounts, fender mounts, flat mount disc, 12x100mm thru axle
Bottom BracketShimano RS500, 86mm, PressFit
HeadsetFSA Integrated, sealed cartridge bearing, 1-1/8'' top, 1.5'' bottom
StemSize: 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
HandlebarSize: 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
SaddleBontrager Montrose Comp, steel rails, 138mm width
SeatpostBontrager Comp, 6061 alloy, 27.2mm, 8mm offset, 330mm length
Groupset
Rear DerailleurShimano GRX RX400, long cage, 36T max cog
Front DerailleurShimano GRX RX400, braze-on
CrankSize: 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
ShiftersShimano GRX RX400, 10 speed
CassetteShimano Tiagra HG500, 11-34, 10 speed
ChainKMC X10
BrakesShimano RX400 hydraulic disc, flat mount
Wheels
RimsBontrager Tubeless Ready, 28-hole, 17mm width, presta valve
Spokes14g stainless steel
Front HubBontrager alloy, sealed bearing, centerlock disc, 100x12mm thru axle
Rear HubBontrager alloy, sealed bearing, centerlock disc, Shimano 11-speed freehub, 142x12mm thru axle
TiresBontrager GR1 Comp, wire bead, 60 tpi, 700x40c
Disk RotorsShimano SM-RT70, centerlock, 160mm
2021 Trek Checkpoint ALR 4
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