300 Series Alpha Aluminum
Light, tough and made for mixed-surface riding.
A versatile aluminum gravel bike that's just as happy on back roads as it is on your commute.
Usually ready in 24 hours
Color: Daintree Green to Power Surge Fade , Size: L
Pickup available, usually ready in 24 hours
179 Leva Avenue
103B
Red Deer County AB T4E 1B9
Canada
Checkpoint ALR 3 is an adventure-ready aluminum gravel bike built for exploring anywhere. Its modern endurance geometry keeps you comfortable over gravel roads or potholes, while a carbon fork helps cut down the road vibrations. It's spec'd to go anywhere without breaking the bank, with Bontrager Paradigm wheels, clearance for 50mm tires,10-speed Shimano CUES 6000 shifting, mechanical disc brakes, and tons of mounts for bags and accessories.
Go anywhere
A 300 Series Alpha Aluminum frame with a full carbon fork, endurance-friendly geometry and room for 50 mm tires.
Light, tough and made for mixed-surface riding.
Ships with 42 mm tires; fits 42 mm with fenders.
Set it up for commuting, touring or bikepacking.
Dependable parts
Simple, reliable components chosen for gravel.
A simple single-chainring setup with a wide 11–48 range.
Dependable, easy-to-service stopping in any weather.
Flared drops give extra control on rough descents.
Checkpoint ALR 3 vs ALR 5
Same versatile aluminum gravel frame and carbon fork. The ALR 5 steps up to 12-speed SRAM Apex, hydraulic brakes and tubeless-ready tires.
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Checkpoint ALR 3$1,999.99 | ||
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| Drivetrain | Shimano CUES 10-speed, 11–48 | SRAM Apex 12-speed, 11–44 |
| Brakes | Tektro mechanical disc | SRAM Apex hydraulic disc |
| Tires | Bontrager Girona Comp 42 mm | Bontrager Girona Pro 42 mm, tubeless ready |
| Frame | 300 Series Alpha Aluminum | 300 Series Alpha Aluminum |
| Fork | Full carbon | Full carbon |
| Weight | 10.41 kg (size ML) | 9.87 kg (size ML) |
Size & fit
Enter your height to get a size recommendation, or come in and we'll fit you in person.
Enter your height and we'll recommend a frame size.
| Size | Rider height | Inseam |
|---|---|---|
| XS | 4'8" – 5'2" (143–158 cm) | 26–29" (67–74 cm) |
| S | 5'2" – 5'5" (158–164 cm) | 29–30" (74–77 cm) |
| M | 5'5" – 5'10" (164–177 cm) | 30–33" (77–83 cm) |
| ML | 5'10" – 6'2" (177–188 cm) | 33–35" (83–88 cm) |
| L | 6'2" – 6'4" (188–194 cm) | 35–36" (88–91 cm) |
| XL | 6'4" – 6'8" (194–203 cm) | 36–37" (91–95 cm) |
Sizing is a guide. Reach, arm length and riding style matter too, so a quick test ride is the best way to confirm.
Between sizes or unsure? Book a fitting or test ride and we'll help you choose.
| Frame size | XS | S | M | ML | L | XL |
|---|---|---|---|---|---|---|
| A – Seat tube | 445 mm | 480 mm | 505 mm | 530 mm | 550 mm | 575 mm |
| C – Head tube length | 96 mm | 117 mm | 140 mm | 162 mm | 181 mm | 201 mm |
| D – Head angle | 71.2° | 71.6° | 71.8° | 72.2° | 72.3° | 72.6° |
| E – Effective top tube | 536 mm | 548 mm | 568 mm | 580 mm | 592 mm | 604 mm |
| G – Bottom bracket drop | 78 mm | 78 mm | 76 mm | 76 mm | 74 mm | 74 mm |
| H – Chainstay length | 435 mm | 435 mm | 435 mm | 435 mm | 435 mm | 435 mm |
| I – Fork offset | 49 mm | 49 mm | 49 mm | 49 mm | 49 mm | 49 mm |
| J – Trail | 74 mm | 71 mm | 70 mm | 67 mm | 66 mm | 65 mm |
| K – Wheelbase | 1025 mm | 1033 mm | 1041 mm | 1048 mm | 1058 mm | 1070 mm |
| L – Standover | 735 mm | 765 mm | 789 mm | 809 mm | 829 mm | 859 mm |
| M – Reach | 380 mm | 385 mm | 391 mm | 397 mm | 402 mm | 408 mm |
| N – Stack | 545 mm | 566 mm | 589 mm | 611 mm | 630 mm | 650 mm |
| Wheel size | 700c | 700c | 700c | 700c | 700c | 700c |
Specifications
Specs from Trek and subject to change. Weights are for the size listed.
Gear up
Finish your gravel setup.