Trek Checkpoint ALR 3 Adventure Gravel Bike 2025

Checkpoint ALR 3 is the best value gravel bike in the lineup. Kitted out with a 300 Series Alpha Aluminum frame, Checkpoint ALR 3 is just as responsive on chunky gravel roads as it is smooth on the tarmac. Tubeless-ready wheels help fight punctures in the rough while a 2x9-speed Shimano groupset and mechanical disc brakes balance budget with reliability.

*Please note - spec applies to all sizes unless listed separately

SPECIFICATIONS:

Frameset
Frame: 300 Series Alpha Aluminum, tapered head tube, Internal cable routing, 3S chain keeper, T47 BB, rack and fender mounts, integrated frame bag mounts, flat mount disc, 142x12mm thru axle
Fork: Checkpoint, full carbon, tapered carbon steerer, rack mounts, fender mounts, flat mount disc, 12x100mm thru axle

Drivetrain
Shifter: Shimano Sora R3000, 9 speed
Front derailleur: Shimano Sora R3000, 31.8mm clamp
Rear derailleur: Shimano Sora R3000, mid cage, 34T max cog
*Crank    Size: 49
FSA Omega, 46x30, 165mm length
Size: 52, 54
FSA Omega, 46x30, 170mm length
Size: 56, 58
FSA Omega, 46x30, 172.5mm length
Size: 61
FSA Omega, 46x30, 175mm length
Cassette: Shimano Sora HG400, 11-32, 9 speed
Chain: Shimano Sora HG53, 9 speed
Max chainring size: See service manual

Wheels
Hub front: Bontrager alloy, sealed bearing, centerlock disc, 100x12mm thru axle
Skewer front: Bontrager Switch thru axle, removable lever
Hub rear: Bontrager alloy, sealed bearing, centerlock disc, Shimano 11-speed freehub, 142x12mm thru axle
Skewer rear: Bontrager Switch thru axle, removable lever
Rim: Bontrager Paradigm, Tubeless Ready, 24-hole, 21mm width, Presta valve
Spokes: 14g stainless steel, black
Tire: Bontrager Girona Pro, Tubeless Ready, GR puncture protection, aramid bead, 60 tpi, 700x42mm
Tire part: Bontrager TLR sealant, 180 ml/6 oz
Rim strip: Bontrager TLR
Max tire size: See service manual

Components
*Saddle    Size: 49, 52
Bontrager P3 Verse Comp, steel rails, 155 mm width
Size: 54, 56, 58, 61
Bontrager P3 Verse Comp, steel rails, 145 mm width
Seatpost    Bontrager alloy, 27.2mm, 12mm offset, 330mm length
*Handlebar    Size: 49
Bontrager Elite Gravel, 38 cm width
Size: 52
Bontrager Elite Gravel, 40 cm width
Size: 54, 56
Bontrager Elite Gravel, 42 cm width
Size: 58, 61
Bontrager Elite Gravel, 44 cm width
Handlebar tape: Bontrager Supertack Perf tape
*Stem    Size: 49
Bontrager Elite, 31.8mm clamp, Blendr compatible, 7 degree, 70mm length
Size: 56, 58
Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 90mm length
Size: 61
Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 100mm length
Brake: Tektro C550 mechanical disc brake, dual piston, flat mount
Brake rotor: Tektro, centerlock, 160mm
Rotor size: Max brake rotor sizes: 160mm front & rear

We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colors, materials, and pricing. Due to supply chain issues, compatible parts may be substituted at any time without notice.

Bike and frame weights are based off pre-production painted frames at time of publication. Weights may vary in final production.