Checkpoint Aluminum

Your go-to gravel buddy

The all-new Checkpoint ALR Gen 3 gravel bike pairs a durable, high-quality aluminum frame with bigger tire clearance, more off-road capability, improved storage, and a comfier fit and riding geometry. Made with a premium-grade aluminum frame designed with the perfect balance of responsiveness and durability, and it's equipped with a carbon fork to absorb road chatter. It’s as ready for backroad rides as it is for everyday commutes and gravel adventures of all sizes.

• Frame Material: Alpha 300 Aluminum
• Max Tire Size: 50mm
• Frame Fit: Gravel Endurance

Checkpoint ALR 4 Gen 3

• Frame 300 Series Alpha Aluminum
• Weight ML - 10.40 kg / 22.93 lbs (with TLR sealant, no tubes)
• Drivetrain Shimano CUES 8000, 11-speed
• Wheels Bontrager Paradigm 23

Checkpoint ALR 4 is an aluminum gravel bike perfect for dipping your toes into the roads less traveled. Its modern endurance geometry keeps you comfortable over gravel roads and potholes, and 50mm tire clearance gives you room for extra grip. It comes equipped with a carbon fork, Bontrager Paradigm wheels, 11-speed Shimano CUES 8000 shifting, hydraulic disc brakes, and tons of mounts for bags and gear.

Mounts galore

The new Checkpoint ALR is equipped to carry everything you need with mounts on the frame and fork for front and rear racks, fenders, and Adventure Top Tube, Frame, and Triangle Bags. Plus, the new frame was optimized to fit extra hydration in addition to all your bags.

Gravel Endurance geometry

Designed with Gravel Endurance geometry with a higher stack and shorter reach for improved comfort and control on long days in the saddle.

Big 'ol tire clearance

Designed with 50mm (or 29 x 2.0)* tire clearance for more grip and comfort on challenging terrain.*As measured

Suspension fork and dropper post compatible

Compatible with a suspension fork* and dropper post for riders tackling technical descents or seeking more aggressive off-road performance. *Available on all sizes except XS frames

A better way to produce aluminum

Starting in 2024, we began removing high-emission aluminum from our manufacturing and replacing it with low-emission aluminum made with renewable energy. By October 2025, nearly every alloy bike we make - this one included - had made the switch, driving a major drop in our footprint.

Specs

Frameset

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

Weight

• Weight: ML - 10.40 kg / 22.93 lbs (with TLR sealant, no tubes)
• Weight limit: This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 275 pounds (125 kg).

Drivetrain

• Shifter: Shimano CUES U6030, 11 speed
• Rear derailleur: Shimano CUES U8000 GS
• *Crank:
  • Size: XS, S
  • Shimano CUES FCU60301, 40T ring, 165mm length
  • Size: M, ML
  • Shimano CUES FCU60301, 40T ring, 170mm length
  • Size: L, XL
  • Shimano CUES FCU60301, 40T ring, 172.5mm length
• Bottom bracket: Praxis, T47 threaded, internal bearing
• Cassette: Shimano CUES LG700, LINKGLIDE, 11-50, 11 speed
• Chain: Shimano LG500, 9/10/11 speed
• Max chainring size: 1x:44 2x: 46/30

Wheels

• Hub front: Bontrager alloy, sealed bearing, centerlock disc, 100x12mm thru axle
  Skewer front: Bontrager Switch chamfered thru axle
• Hub rear: Bontrager alloy, sealed bearing, centerlock disc, Shimano 11-speed freehub, 142x12mm thru axle
• Skewer rear: Bontrager Switch chamfered thru axle, removable lever
• Rim: Bontrager Paradigm 23, Tubeless Ready, 24-hole, 23mm 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, 6oz
• Max tire size: 50mm without fenders, 42mm with fenders (as measured, see manual for details)

Components

• Saddle: Verse Short Comp, steel rails, 145mm width
• Seatpost: Bontrager alloy, 27.2mm, 12mm offset, 330mm length
• *Handlebar:
  • Size: XS, S
  • Bontrager Elite Gravel, alloy, 40cm width
  • Size: M, ML
  • Bontrager Elite Gravel, alloy, 42cm width
  • Size: L
  • Bontrager Elite Gravel, alloy, 44cm width
  • Size: XL
  • Bontrager Elite Gravel, alloy, 46cm width
• Handlebar tape: Bontrager Supertack Perf tape
• *Stem:
  • Size: XS
  • Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 70mm length
  • Size: S, M
  • Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 80mm length
  • Size: ML, L
  • Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 90mm length
  • Size: XL
  • Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 100mm length
• *Brake:
  • Size: XS, S, M, ML, L, XL
  • Shimano CUES U6030
  • Size: XS, S, M, ML, L, XL
  • Shimano CUES hydraulic disc, flat mount
• Brake rotor: Shimano RT54, centerlock, 160mm
• Rotor size: Max brake rotor sizes: 180mm front & rear

Sizing

How tall are you?

To measure your height, stand straight up, barefoot, with your back, heels, shoulders and head all touching a wall. While looking straight ahead, place a book or straight edge on your head and slowly push it against the wall. Your straight edge should be parallel with the floor. Mark the spot where the bottom of the book is touching the wall. The distance from the marked spot to the floor is your height.

What is your inseam?

How to measure: Stand barefoot with your back straight and against a wall. Tuck a ruler or something that extends to the floor between your legs. Using both hands, and keeping it level, pull the ruler up into your crotch as if you were sitting on the saddle. Measure the distance from the top edge of the ruler to the ground to find your inseam measurement. Your inseam is very important to your final bike size so please measure carefully.

Sizing

Geometry

All measurements provided in cm unless otherwise noted.

Geometry diagram labeling frame measurements A through N. Each label corresponds to a row in the geometry table below.