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You're ready for adventures beyond the beaten path and want a gravel bike that balances budget and capability. Checkpoint ALR 4 is your ticket to turning every ride into an adventure.
The tech you get
A responsive 300 Series Alpha Aluminum frame, hidden cables that won't interfere with bags, integrated rack, fender, and frame bag mounts, a 1x11 speed SRAM Apex drivetrain for smooth shifting on punchy climbs and variable terrain, mechanical disc brakes for ease of stopping quick in all conditions, tubeless ready rims, and wide Bontrager Girona Pro 700x42c gravel tires for added comfort and traction.
The final word
If you're ready to start exploring every road while taking on the daily grind, Checkpoint ALR 4 is the ride for you. Versatility is the name of the game and a durable alloy frame, mounts for all kinds of accessories, and wide tires make for comfort and customization wherever the road, or lack thereof takes you.
The Walkthrough
Why you'll love it
The durable and capable 300 Series Alpha Aluminum frame makes for a fun, stable, and responsive ride
You get serious versatility that's suited for a wide variety of ride styles, from gravel and bikepacking to daily commutes
Massive tire clearance means you can use tires up to 45c for extra traction and stability in any conditions
Fork, top tube, and integrated frame mounts make it easy to carry gear and water
Powerful mechanical disc brakes make stopping in all conditions easy
"An excellent gravel race bike"
"Trek's new Checkpoint SLR 9 eTap is an excellent gravel race bike, built with features and geometry that calm rough surfaces without the handling feeling vague or sluggish. After two months on it, I can say that the bike we named the 2021 VeloNews Bike of the Year has only gotten better."
"What Trek gets right with the Checkpoint is the handling, the comfort, the storage options, and the flexibility to alter the cockpit or the drivetrain. The attention to detail...is welcome and warranted for a top-end machine."
"More capable….easier to ride on fast on unpaved surfaces"
"As with other bikes with similarly long front ends, the revamped Checkpoint is easier and more confidence-inspiring to ride off-road on even moderately steep or loose terrain than before."
"Trek has revamped its Checkpoint line-up, with the updated gravel bike coming in not one but three different flavours, catering for the needs of go-fast racers, rough-and-ready adventurers and riders looking for a versatile N+1."
Time to bust out the repair stand for some maintenance? Find a detailed breakdown of your bike with part numbers, torque values, and platform-specific tech instructions below.
Whether you're racing for the win or for the joy of getting out on two wheels with hundreds of like-minded riders, getting started with gravel racing is easy - it just takes some planning.
This bike doesn’t come with pedals because you’ll have a better time on your new bike if you choose your own. See the pedal guide to find the best pedals for your riding style.
Wider gravel-specific tires provide better traction and more stability while riding on gravel or dirt tracks.
Flat Mount disc brakes
All-new Flat Mount disc brakes are more elegant, lighter, smaller, and cleaner than traditional disc brakes, providing superior performance and stopping power under harsh conditions.
Tubeless Ready rims
Bontrager TLR (Tubeless Ready) Road is the first fully integrated tubeless system for road wheels. When you go tubeless with TLR, you can run lower tire pressure for increased traction and comfort without the threat of pinch flats.
Blendr-compatible stem
Bontrager Blendr stem technology lets you clip your gear directly to the stem for clean looks, maximum user friendliness.
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. Prices shown are manufacturer's suggested retail prices.
Bike and frame weights are based off pre-production painted frames at time of publication. Weights may vary in final production.
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
size-table
Size
Rider Height
Inseam
49
156 - 163 cm
5'1" - 5'4"
74 - 77 cm
29" - 30"
52
163 - 168 cm
5'4" - 5'6"
76 - 79 cm
30" - 31"
54
168 - 174 cm
5'6" - 5'9"
78 - 82 cm
31" - 32"
56
174 - 180 cm
5'9" - 5'11"
81 - 85 cm
32" - 33"
58
180 - 185 cm
5'11" - 6'1"
84 - 87 cm
33" - 34"
61
185 - 191 cm
6'1" - 6'3"
86 - 90 cm
34" - 35"
Geometry
All measurements provided in cm unless otherwise noted.
