Trek Checkpoint ALR 4 2025 - Gravel Bike
The Checkpoint ALR 4 is built for adventure, combining a responsive alloy frame with stable gravel geometry, a carbon fork, SRAM Apex 1x11 shifting and tubeless-ready wheels to take you confidently off the beaten path.
Key Features
- 300 Series Alpha Aluminium frame, stable geometry, 45 mm tyre clearance, rack/mudguard mounts
- Full carbon fork with tapered steerer, rack and mudguard mounts
- SRAM Apex 1x11 drivetrain with wide-range cassette
- Tektro C550 mechanical disc brakes with dual pistons
- Bontrager Paradigm Tubeless Ready wheelset
- Bontrager GR1 Team Issue 700x40 mm tyres with gravel-ready tread
- Internal routing, frame bag mounts, and T47 bottom bracket
- Available with 0% APR finance
The Trek Checkpoint ALR 4 is an ideal gateway into the world of gravel, built for riders who want a bike that’s ready for commuting, bikepacking and weekend escapes. At its core is a 300 Series Alpha Aluminium frame, tuned for responsive handling with a stable stance, giving you the confidence to tackle loose corners or fast road descents.
With hidden cable routing, rack and mudguard mounts, and integrated frame bag mounts, it’s built for versatility and ready to be loaded up for bigger trips. There's room for tyres up to 45 mm wide, so you can swap in chunkier rubber for rougher terrain or stick with the fitted Bontrager GR1 Team Issue 700x40 mm tyres for a fast-rolling, puncture-resistant ride with plenty of grip on hardpack and light gravel.
The drivetrain is a 1x11 SRAM Apex set-up, using a 40T chainring paired with an 11–42T cassette, offering a wide range of gears for steep climbs without the complexity of a front mech. Tektro C550 mechanical disc brakes provide reliable stopping power with minimal maintenance, and the Bontrager Paradigm wheels are tubeless-ready to reduce flats and improve comfort when set up with lower pressures.
Finished with a carbon fork for added comfort and lighter weight up front, the Checkpoint ALR 4 keeps things responsive and adaptable, whether you’re heading out for a quick loop or a day-long journey on mixed terrain.
If you’re looking for a reliable gravel bike with modern features and the flexibility to customise as you go, the Checkpoint ALR 4 delivers excellent value and plenty of adventure potential.
Occasionally, without notice, manufacturers change product design and/or specifications.
| Frame | 300 Series Alpha Aluminium, tapered head tube, Internal cable routing, 3S chain keeper, T47 BB, rack and mudguard mounts, integrated frame bag mounts, flat-mount disc, 142x12 mm thru-axle |
| Fork | Checkpoint carbon, tapered carbon steerer, rack mounts, mudguard mounts, flat-mount disc, 12x100 mm thru axle |
| Stem | Bontrager Elite, 31.8 mm, Blendr-compatible, 7-degree, 70 mm length |
| Bars | Bontrager Elite Gravel, alloy, 38 cm width |
| Front Brake | Tektro C550 mechanical disc brake, dual piston, flat mount // Tektro C550 mechanical disc brake, dual piston, flat mount |
| Rear Brake | Tektro C550 mechanical disc brake, dual piston, flat mount // Tektro C550 mechanical disc brake, dual piston, flat mount |
| Rear Mech | SRAM Apex 1, long cage, 42T max cog |
| Speed | 11 |
| Rims | Bontrager Paradigm, Tubeless Ready, 24-hole, 21 mm width, Presta valve |
| Front Hub | Bontrager alloy, sealed bearing, CentreLock disc, 100x12 mm thru axle |
| Rear Hub | Bontrager alloy, sealed bearing, CenterLock disc, Shimano 11-speed freehub, 142x12 mm thru axle |
| Front Tyre | Bontrager GR1 Team Issue, Tubeless Ready, Inner Strength casing, aramid bead, 120 tpi, 700x40 mm |
| Rear Tyre | Bontrager GR1 Team Issue, Tubeless Ready, Inner Strength casing, aramid bead, 120 tpi, 700x40 mm |
| Seat Post | Bontrager alloy, 27.2 mm, 12 mm offset, 330 mm length |
| Saddle | Bontrager Verse Comp, steel rails, 155 mm width |
| Chainset | SRAM Apex 1, 40T, DUB Wide, 165 mm length |
| Bottom Bracket | SRAM DUB, T47 threaded, internal bearing |
| Chain | SRAM PC-1130, 11-speed |
| Cassette | SRAM PG-1130, 11-42, 11-speed |
Trek Checkpoint ALR 2025 Size Chart
| Size | Height cm | Height Feet / Inches | Inseam cm | Inseam Inches |
|---|---|---|---|---|
| XS (49cm) | 143 - 158 cm | 4'8" - 5'2" | 67 - 74 cm | 26" - 29" |
| S (49-52cm) | 158 - 164 cm | 5'2" - 5'5" | 74 - 77 cm | 29" - 30" |
| M (52-54cm) | 164 - 177 cm | 5'5" - 5'10" | 77 - 83 cm | 30" - 33" |
| ML (56cm) | 177 - 188 cm | 5'10" - 6'2" | 83 - 88 cm | 33" - 35" |
| L (58cm) | 188 - 194 cm | 6'2" - 6'4" | 88 - 91 cm | 35" - 36" |
| XL (61cm) | 194 - 203 cm | 6'4" - 6'8" | 91 - 95 cm | 36" - 37" |
What size frame do I need if I am between sizes? - read here
Trek Checkpoint ALR 2025 Geometry Chart
| Size | 49 cm | 52 cm | 54 cm | 56 cm | 58 cm | 61 cm |
|---|---|---|---|---|---|---|
| Stack | 538 | 553 | 571 | 592 | 609 | 639 |
| Reach | 393 | 399 | 403 | 407 | 411 | 417 |
| Head Tube Length | 90 | 105 | 125 | 145 | 165 | 195 |
| Head Tube Angle | 71.2° | 71.6° | 71.8° | 72.2° | 72.3° | 72.6° |
| Bottom Bracket Drop | 78 | 78 | 76 | 76 | 74 | 74 |
| Trail | 7.4 | 7.1 | 7.0 | 6.7 | 6.6 | 6.5 |
| Fork Rake/Offset | 45 | 45 | 45 | 45 | 45 | 45 |
| Chainstay Length | 435 | 435 | 435 | 435 | 435 | 435 |
| Wheelbase | 1025 | 1033 | 1041 | 1048 | 1058 | 1070 |
| Top Tube Length (horizontal) | 541 | 555 | 570 | 584 | 597 | 617 |
| Standover Height | 735 | 765 | 789 | 809 | 829 | 859 |
| Seat Tube Length | 490 | 520 | 540 | 560 | 580 | 610 |
| Seat Tube Angle | 74.1° | 73.7° | 73.2° | 72.8° | 72.5° | 72.1° |
| Stem length | 70 | 80 | 80 | 90 | 90 | 100 |
All measurements are in mm unless otherwise stated.
The above table shows the standard geometry for the bicycle as shipped, other geometry configurations may be available with certain bikes. Please contact us via Live Chat to find out more.
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Trek Checkpoint ALR 4 2025 - Gravel Bike
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