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Trek Checkpoint ALR 4

Trek Checkpoint ALR 4
  • Color: Dark Aquatic
  • Color: Rage Red
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The Checkpoint series from Trek is a no-compromise adventure-ready machine. With room for wide tires (up to 45mm!) and rack mounts galore, the Checkpoint is ready for hundreds of miles in uncharted territory, or just a trip to the grocery store.

The Checkpoint ALR 4 blends the best attributes of endurance road bikes, touring bikes and hardtail mountain bikes. A long wheelbase and stable geometry helps keep the Checkpoint where you pointed it (pun intended) on broken pavement and soft pea-gravel. Even the bottom bracket/crankset location was set slightly lower compared to road bikes to improve the rider's center of gravity. Ample tire clearance allows meaty rubber to be installed for boatloads of traction on loose surfaces, especially on steep climbs. The upright fit of the Checkpoint adds comfort on multi-day expeditions or just bumpy roads. Mounts for racks, fenders, and bottle cages are found all over the Checkpoint ALR 4, including front low-rider mounts and a bottle cage mount on the underside of the down tube. The multiple bottle mounts on the interior of the main triangle are designed to allow a sizeable frame bag to be used without ditching hydration.

Trek used their proprietary 300 Series Alpha aluminum for the Checkpoint's frame, ensuring light weight and impressive torsional strength. Out back, adjustable Stranglehold 12mm thru-axle dropouts allow the use of even wider tires and fenders, or to shorten the wheelbase for more nimble handling. The adjustable dropouts also allow the Checkpoint to be converted to a singlespeed drivetrain as well. Cool, huh? Up front, a carbon fiber fork soaks up vibration exceptionally well, while also featuring 12mm thru-axle dropouts and multiple rack and fender mounts.

Knowing that Checkpoint the ALR series bikes might be used in rough conditions and bad weather, Trek equipped them with Shimano's gravel-oriented GRX components. This Checkpoint ALR 4 uses Shimano GRX 10-speed shifters and derailleurs, delivering excellent functionality and durability. The rear derailleur is clutch-equipped, ensuring precise gear changes and chain retention, especially on rough surfaces. The GRX lever shape has been profiled to be more comfortable for extended riding on the hoods. An alloy GRX 46/30T crankset is paired with an 11-34T Shimano cassette, bringing a very wide gearing range for challenging inclines. Bontrager's tubeless-ready alloy wheels are shod with knobby 700x40c Bontrager GR1 Comp gravel tires. Shimano GRX hydraulic disc brakes boast excellent stopping power in all conditions, rain or shine. Finishing kit for the Checkpoint ALR 4 checks many boxes in the comfort department, including a Bontrager Verse saddle and a Bontrager Elite IsoZone VR-CF with elastomer padding under the bar tape. An accessory-ready alloy Elite Blendr stem and alloy seatpost finishes off this adventure-ready steed.


Frame 300 Series Alpha Aluminum, tapered head tube, Control Freak internal routing, 3S chain keeper, rack and fender mounts, flat mount disc, Stranglehold dropouts
Fork Checkpoint carbon, tapered alloy steerer, rack mounts, fender mounts, flat mount disc
Headset FSA Integrated, sealed cartridge bearing, 1-1/8'' top, 1.5'' bottom
Axles Front: 12 x 100mm thru-axle
Rear: 12 x 142mm thru-axle
Rims/Wheels Bontrager Tubeless Ready, 28-hole, 17mm width, Presta valve
Hubs Bontrager alloy, sealed bearing, Center Lock disc, Shimano/SRAM 11-speed freehub
Spokes 14g stainless steel, black
Tires Bontrager GR1 Comp, wire bead, 60TPI, 700x40c
Crankset Shimano GRX RX600
Chainrings 46/30T
Bottom Bracket Shimano RS500, 92mm, PressFit
Chain KMC X10
Front Derailleur Shimano GRX RX400, braze-on
Rear Derailleur Shimano GRX RX400, long cage, 36T max cog
Cassette/Rear Cogs Shimano Tiagra HG500, 11-34T, 10 speed
Shifters Shimano GRX RX400, 10-speed
Handlebars Bontrager Elite IsoZone VR-CF, alloy, 31.8mm, 93mm reach, 123mm drop
Tape/Grips Bontrager Supertack Perf tape
Stem Bontrager Elite, 31.8mm, Blendr compatible, 7 degree
Brake Levers Shimano GRX hydraulic
Brakes Shimano GRX hydraulic disc, flat mount, w/Shimano SM-RT70, 160mm Center Lock rotors
Saddle Bontrager Montrose Comp, steel rails, 138mm width
Seat Post Bontrager Comp, 6061 alloy, 27.2mm, 8mm offset, 330mm length

* Subject to change without notice.