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It's right for you if...
You want a single durable, ultra-versatile gravel bike that's ready for adventure. Gravel? Check. Pavement? Check. Multi-day bikepacking? Check. Foul-weather commuting? Check. Check. Check.
The tech you get
A stout aluminum frame with rack and fender mounts, a vibration-absorbing carbon fork, a 2x10 Shimano GRX drivetrain with lower gears for grinding up hills or through rough gravel, hydraulic disc brakes for all-condition stopping power, and wide 700x40c gravel tires for added stability and traction.
The final word
Bring it on, gravel! Checkpoint ALR 4 is a high-value gateway to a world of adventure. It's rugged, fast, comfortable, and has an amazing amount of tech for its price. Though it's made to stand up to the rigors of gravel roads, the frame geometry and accessory mounts make it a great choice for road rides and commutes, too.
The Walkthrough
favorite_borderWhy you'll love it
- Checkpoint ALR 4 introduces you to the exciting new frontier of gravel riding at a value that can't be matched
- This bike is exceedingly versatile and suited to a wide variety of ride styles, including gravel rides, bikepacking, and daily commutes
- Mounts on the seat tube and both sides of the down tube make it easy to carry extra gear and water
- Massive tire clearance means you can use tires up to 45c for extra traction and stability in any conditions
- The horizontal sliding dropout makes it easy to fine-tune your geometry or run singlespeed
Features
Stranglehold dropout
Horizontal sliding dropout with redundant securing mechanisms allows for no-slip singlespeed or geared options and provides the ability to dial in the geometry to match each rider’s style.
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Blendr-compatible stem
Bontrager Blendr stem technology lets you clip your gear directly to the stem for clean looks, maximum user friendliness.
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Carbon fork
Lightweight fork with carbon fibre legs soaks up hand-numbing road vibration.
Tubeless Ready rims
Bontrager TLR (Tubeless Ready) Road is the first fully integrated tubeless system for the road. No tubes mean there’s no pinch flats, allowing you to run lower tire pressure. With lower tire pressure you can increase traction, control. and comfort, reduce fatigue on you. Best of all, the tire sealant seals up punctures as soon as they happen!
300 Series Alpha Aluminum
Trek’s premium-grade aluminum is hydroformed into size-specific tubes that provide the perfect balance of stiffness and weight.
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Gravel Specific Tyres
Domane Gravel features wider 700x35c gravel-specific tyres that 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.
Specifications
*spec applies to all sizes unless otherwise noted
| Frame | 300 Series Alpha Aluminium, tapered head tube, Control Freak internal routing, 3S chain keeper, rack and fender mounts, flat mount disc, horizontal sliding dropouts, 142x12 mm thru-axle |
|---|---|
| Fork | Checkpoint carbon, tapered alloy steerer, rack mounts, mudguard mounts, flat-mount disc, 12x100 mm thru axle |
| Frame fit | Gravel |
| Hub front | Bontrager alloy, sealed bearing, CenterLock disc, 100x12 mm thru axle |
|---|---|
| Skewer front | 100x12 mm thru-axle |
| Hub rear | Bontrager alloy, sealed bearing, CenterLock disc, Shimano 11-speed freehub, 142x12 mm thru axle |
| Skewer rear | 142x12 mm thru-axle, 174 mm length |
| Rim | Bontrager Tubeless Ready, 28-hole, 17 mm width, Presta valve |
| Spokes | 14 g stainless steel |
| Tire | Bontrager GR1 Comp, wire bead, 60 tpi, 700x40 c |
| Max tire size | 45c Bontrager tires (49 & 52cm: 40c due to toe overlap), with at least 4mm of clearance to frame |
| Shifter | Shimano GRX RX400, 10-speed |
|---|---|
| Front derailleur | Shimano GRX RX400, braze-on |
| Rear derailleur | Shimano GRX RX400, long cage, 36T max cog |
| *Crank |
Size:
49 Shimano GRX RX600, 46/30, 165 mm length |
|
Size:
52 Shimano GRX RX600, 46/30, 170 mm length |
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Size:
54, 56 Shimano GRX RX600, 46/30, 172.5 mm length |
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Size:
58, 61 Shimano GRX RX600, 46/30, 175 mm length |
|
| Bottom bracket | Shimano RS500, 86 mm, PressFit |
| Cassette | Shimano Tiagra HG500, 11-34, 10-speed |
| Chain | KMC X10 |
| Saddle | Bontrager Montrose Comp, steel rails, 138 mm width |
|---|---|
| Seatpost | Bontrager Comp, 6061 alloy, 27.2 mm, 8 mm offset, 330 mm length |
| *Handlebar |
Size:
49 Bontrager Elite IsoZone VR-CF, alloy, 31.8 mm, 93 mm reach, 123 mm drop, 38 cm width |
|
Size:
52 Bontrager Elite IsoZone VR-CF, alloy, 31.8 mm, 93 mm reach, 123 mm drop, 40 cm width |
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Size:
54, 56 Bontrager Elite IsoZone VR-CF, alloy, 31.8 mm, 93 mm reach, 123 mm drop, 42 cm width |
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Size:
58, 61 Bontrager Elite IsoZone VR-CF, alloy, 31.8 mm, 93 mm reach, 123 mm drop, 44 cm width |
|
| Handlebar tape | Bontrager Supertack Perf tape |
| *Stem |
Size:
49 Bontrager Elite, 31.8 mm, Blendr-compatible, 7-degree, 80 mm length |
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Size:
52, 54 Bontrager Elite, 31.8 mm, Blendr-compatible, 7-degree, 90 mm length |
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Size:
56, 58 Bontrager Elite, 31.8 mm, Blendr-compatible, 7-degree, 100 mm length |
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Size:
61 Bontrager Elite, 31.8 mm, Blendr-compatible, 7-degree, 110 mm length |
|
| Headset | FSA Integrated, sealed cartridge bearing, 1-1/8" top, 1.5" bottom |
| Brake | Shimano RX400 hydraulic disc, flat mount |
| Brake rotor | Shimano SM-RT70, CenterLock, 160 mm |
| Weight | 56 - 10.26 kg / 22.62 lbs |
|---|---|
| Weight limit | This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 275 pounds (125 kg). |
Sizing & fit
The charts below show our recommended sizes based on height, but there are some other factors, like arm and leg length, that determine a great fit. That’s why you’ll see some overlap in our recommendations. Not every rider who’s 5´8˝, for example, will fit on the same size bike. The best way to find your perfect fit is to consult the experts at your local retailer.
Rider Height
Inseam
49
156.0 - 162.0 cm
5'1.4" - 5'3.8"
74.0 - 77.0 cm
29.1" - 30.3"
52
163.0 - 168.0 cm
5'4.2" - 5'6.1"
76.0 - 79.0 cm
29.9" - 31.1"
54
168.0 - 174.0 cm
5'6.1" - 5'8.5"
78.0 - 82.0 cm
30.7" - 32.3"
56
174.0 - 180.0 cm
5'8.5" - 5'10.9"
81.0 - 85.0 cm
31.9" - 33.5"
58
180.0 - 185.0 cm
5'10.9" - 6'0.8"
84.0 - 87.0 cm
33.1" - 34.3"
61
185.0 - 191.0 cm
6'0.8" - 6'3.2"
86.0 - 90.0 cm
33.9" - 35.4"
All measurements provided in cm unless otherwise stated.
| Frame size number | Wheel size | A — Seat tube | B — Seat tube angle | C — Head tube length | D — Head angle | E — Effective top tube | G — Bottom bracket drop | H — Chainstay length | I — Offset | J — Trail | K — Wheelbase | L — Standover | M — Frame reach | N — Frame stack |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 49 cm | 700c | 49.0 | 75.0° | 9.0 | 71.4° | 51.5 | 7.8 | 42.5 | 4.9 | 6.6 | 99.5 | 74.9 | 37.3 | 53.2 |
| 52 cm | 700c | 52.0 | 74.0° | 10.7 | 71.6° | 53.6 | 7.8 | 42.5 | 4.9 | 6.5 | 100.5 | 77.0 | 37.9 | 54.9 |
| 54 cm | 700c | 54.0 | 73.5° | 12.6 | 71.8° | 55.1 | 7.6 | 42.5 | 4.9 | 6.4 | 101.4 | 78.9 | 38.3 | 56.7 |
| 56 cm | 700c | 56.0 | 73.0° | 14.5 | 72.2° | 56.6 | 7.6 | 42.5 | 4.9 | 6.1 | 102.0 | 80.8 | 38.7 | 58.6 |
| 58 cm | 700c | 58.0 | 73.0° | 17.1 | 72.3° | 57.7 | 7.4 | 42.5 | 4.9 | 6.1 | 103.2 | 82.9 | 39.1 | 60.9 |
| 61 cm | 700c | 61.0 | 73.0° | 20.0 | 72.6° | 59.2 | 7.4 | 42.5 | 4.9 | 5.9 | 104.4 | 85.8 | 39.7 | 63.8 |