Trek Checkpoint ALR 4
Details
Checkpoint ALR 4 is a high-value gravel bike ready for the roads less traveled. Kitted out with a 300 Series Alpha Aluminum frame, Checkpoint ALR 4 is just as responsive on chunky gravel roads as it is smooth on the tarmac. Tons of features like tubeless ready wheels, a SRAM Apex 11-speed drivetrain, and mechanical disc brakes make Checkpoint ALR 4 the perfect ride for ease of entry into the wide world of gravel.
It's right for you if...
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.
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
| Frame size number | 49 cm | 52 cm | 54 cm | 56 cm | 58 cm | 61 cm |
|---|---|---|---|---|---|---|
| Wheel size | 700c | 700c | 700c | 700c | 700c | 700c |
| A — Seat tube | 49 | 52 | 54 | 56 | 58 | 61 |
| B — Seat tube angle | 74.1° | 73.7° | 73.2° | 72.8° | 72.5° | 72.1° |
| C — Head tube length | 9 | 10.5 | 12.5 | 14.5 | 16.5 | 19.5 |
| D — Head angle | 71.2° | 71.6° | 71.8° | 72.2° | 72.3° | 72.6° |
| E — Effective top tube | 54.1 | 55.5 | 57 | 58.4 | 59.7 | 61.7 |
| G — Bottom bracket drop | 7.8 | 7.8 | 7.6 | 7.6 | 7.4 | 7.4 |
| H — Chainstay length | 43.5 | 43.5 | 43.5 | 43.5 | 43.5 | 43.5 |
| I — Offset | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 |
| J — Trail | 7.4 | 7.1 | 7 | 6.7 | 6.6 | 6.5 |
| K — Wheelbase | 102.5 | 103.3 | 104.1 | 104.8 | 105.8 | 107 |
| L — Standover | 73.5 | 76.5 | 78.9 | 80.9 | 82.9 | 85.9 |
| M — Frame reach | 39.3 | 39.9 | 40.3 | 40.7 | 41.1 | 41.7 |
| N — Frame stack | 53.8 | 55.3 | 57.1 | 59.2 | 60.9 | 63.9 |
| Stem length | 70 | 80 | 80 | 90 | 90 | 100 |
| 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" |
Specs
| Frame | 300 Series Alpha Aluminum, tapered head tube, Internal cable routing, 3S chain keeper, T47 BB, rack and fender mounts, integrated frame bag mounts, flat mount disc, 142x12mm thru axle |
|---|---|
| Fork | Checkpoint, full carbon, tapered carbon steerer, rack mounts, fender mounts, flat mount disc, 12x100mm thru axle |
| Rims | Bontrager Paradigm, Tubeless Ready, 24-hole, 21mm width, Presta valve |
| Hubs |
Front: Bontrager alloy, sealed bearing, centerlock disc, 100x12mm thru axle Rear: Bontrager alloy, sealed bearing, centerlock disc, Shimano 11-speed freehub, 142x12mm thru axle |
| Spokes | 14g stainless steel, black |
| Tires |
Size: 49, 52, 54, 56, 58, 61 Bontrager GR1 Team Issue, Tubeless Ready, Inner Strength casing, aramid bead, 120 tpi, 700x40mm Size: 49, 52, 54, 56, 58, 61 Bontrager Girona Pro, Tubeless Ready, GR puncture protection, aramid bead, 60 tpi, 700x42mm |
| Bottom Bracket | SRAM DUB, T47 threaded, internal bearing |
| Crankset | Size: 49 SRAM Apex 1, 40T, DUB Wide, 165mm length, Size: 52 SRAM Apex 1, 40T, DUB Wide, 170mm length, Size: 54, 56 SRAM Apex 1, 40T, DUB Wide, 172.5mm length, Size: 58, 61 SRAM Apex 1, 40T, DUB Wide, 175mm length |
| Shifters | SRAM Apex, 11 speed |
| Rear Derailleur | SRAM Apex 1, long cage, 42T max cog |
| Cassette/Freewheel | SRAM PG-1130, 11-42, 11 speed |
| Chain | SRAM PC-1130, 11 speed |
| Brakes | Tektro C550 mechanical disc brake, dual piston, flat mount |
| Rotors | Tektro, centerlock, 160mm |
| Handlebars |
Size: 49 Bontrager Elite Gravel, 38cm width Size: 52 Bontrager Elite Gravel, 40cm width Size: 54, 56 Bontrager Elite Gravel, 42cm width Size: 58, 61 Bontrager Elite Gravel, 44cm width |
| Tape/Grips | Bontrager Supertack Perf tape |
| Stem |
Size: 49 Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 70mm length Size: 49 Bontrager Elite, 31.8mm clamp, Blendr compatible, 7 degree, 70mm length Size: 52, 54 Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 80mm length Size: 56, 58 Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 90mm length Size: 61 Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 100mm length |
| Seatpost | Bontrager alloy, 27.2mm, 12mm offset, 330mm length |
| Saddle |
Size: 49, 52 Bontrager Verse Comp, steel rails, 155mm width Size: 54, 56, 58, 61 Bontrager Verse Comp, steel rails, 145mm width |
* Subject to change without notice.
Part Numbers
| Option | UPC | MPN | Store SKU |
|---|---|---|---|
| Matte Galactic Grey / 58cm / 700c | 768682570968 | 5304227 | 5304227 |