Trek Checkpoint ALR 4 Bike
Checkpoint ALR 4 is an aluminum gravel bike that offers an incredible amount of capability for the price. It’s built for the rigors of gravel and dirt roads, but it’s also right at home on morning commutes and centuries. This bike knows no boundaries, which makes it the ideal gateway to adventure on any road or path.
Specifications
*spec applies to all sizes unless otherwise noted
Frameset
| Frame | 300 Series Alpha Aluminum, tapered head tube, Control Freak internal routing, 3S chain keeper, rack and fender mounts, flat mount disc, horizontal sliding dropouts, 142x12mm thru axle |
|---|---|
| Fork | Checkpoint carbon, tapered alloy steerer, rack mounts, fender mounts, flat mount disc, 12x100mm thru axle |
| Frame fit | Gravel |
Wheels
| Hub front | Bontrager alloy, sealed bearing, centerlock disc, 100x12mm thru axle |
|---|---|
| Skewer front | 100x12mm thru axle |
| Hub rear | Bontrager alloy, sealed bearing, centerlock disc, Shimano 11-speed freehub, 142x12mm thru axle |
| Skewer rear | 142x12mm thru axle, 174mm length |
| Rim | Bontrager Tubeless Ready, 28-hole, 17mm width, presta valve |
| Spokes | 14g stainless steel |
| Tire | Bontrager GR1 Comp, wire bead, 60 tpi, 700x40c |
| Max tire size | 45c Bontrager tires (49 & 52cm: 40c due to toe overlap), with at least 4mm of clearance to frame |
Drivetrain
| 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, 165mm length |
| Size: 52 Shimano GRX RX600, 46/30, 170mm length |
|
| Size: 54, 56 Shimano GRX RX600, 46/30, 172.5mm length |
|
| Size: 58, 61 Shimano GRX RX600, 46/30, 175mm length |
|
| Bottom bracket | Shimano RS500, 86mm, PressFit |
| Cassette | Shimano Tiagra HG500, 11-34, 10 speed |
| Chain | KMC X10 |
Components
| Saddle | Bontrager Montrose Comp, steel rails, 138mm width |
|---|---|
| Seatpost | Bontrager Comp, 6061 alloy, 27.2mm, 8mm offset, 330mm length |
| *Handlebar | Size: 49 Bontrager Elite IsoZone VR-CF, alloy, 31.8mm, 93mm reach, 123mm drop, 38cm width |
| Size: 52 Bontrager Elite IsoZone VR-CF, alloy, 31.8mm, 93mm reach, 123mm drop, 40cm width |
|
| Size: 54, 56 Bontrager Elite IsoZone VR-CF, alloy, 31.8mm, 93mm reach, 123mm drop, 42cm width |
|
| Size: 58, 61 Bontrager Elite IsoZone VR-CF, alloy, 31.8mm, 93mm reach, 123mm drop, 44cm width |
|
| Handlebar tape | Bontrager Supertack Perf tape |
| *Stem | Size: 49 Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 80mm length |
| Size: 52, 54 Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 90mm length |
|
| Size: 56, 58 Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 100mm length |
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| Size: 61 Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 110mm 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, 160mm |
Weight
| 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 noted.
| 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 |
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