The Checkpoint ALR 4 is a high-value gravel bike ready for the roads less travelled. Kitted out with a 300 Series Alpha Aluminium frame, the 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. The Checkpoint ALR 4 is your ticket to turning every ride into an adventure.
The tech you get
A responsive 300 Series Alpha Aluminium frame, hidden cables that won't interfere with bags, integrated rack, mudguard 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 tyres for added comfort and traction.
The final word
If you're ready to start exploring every road while taking on the daily grind, the 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 tyres make for comfort and customisation wherever the road, or lack thereof, takes you.
Why you'll love it
| Category | Detail |
| Frameset | |
| 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 |
| Weight | |
| Weight | 56 - 9.91 kg / 21.85 lbs (with TLR sealant, no tubes) |
| Weight limit | This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 125 kg (275 lb) |
| Drivetrain | |
| Shifter | SRAM Apex, 11-speed |
| Rear Derailleur | SRAM Apex 1, long cage, 42T max cog |
| Crank | Size: 49 - SRAM Apex 1, 40T, DUB Wide, 165 mm length Size: 52 - SRAM Apex 1, 40T, DUB Wide, 170 mm length Size: 54, 56 - SRAM Apex 1, 40T, DUB Wide, 172.5 mm length Size: 58 - SRAM Apex 1, 40T, DUB Wide, 175 mm length |
| Bottom Bracket | SRAM DUB, T47 threaded, internal bearing |
| Cassette | SRAM PG-1130, 11-42, 11-speed |
| Chain | SRAM PC-1130, 11-speed |
| Max. Chainring Size | 1x: 44T (SRAM), 50T (Shimano), 2x: 50/34 |
| Wheels | |
| Hub (Front) | Size: 49, 52, 54, 56 - Bontrager alloy, sealed bearing, CenterLock disc, 100x12 mm thru axle Size: 52, 54, 56, 58 - Bontrager alloy, sealed bearing, CentreLock disc, 100x12 mm thru axle |
| Skewer (Front) | Bontrager Switch thru axle, removable lever |
| Hub (Rear) | Bontrager alloy, sealed bearing, CenterLock disc, Shimano 11-speed freehub, 142x12 mm thru axle |
| Skewer (Rear) | Bontrager Switch thru-axle, removable lever |
| Rim | Bontrager Paradigm, Tubeless Ready, 24-hole, 21 mm width, Presta valve |
| Spokes | 14 g stainless steel, black |
| Tyre | Bontrager GR1 Team Issue, Tubeless Ready, Inner Strength casing, aramid bead, 120 tpi, 700x40 mm |
| Tyre Part | Bontrager TLR sealant, 180 ml/6 oz |
| Rim Strip | Bontrager TLR |
| Max Tyre Size | See service manual |
| Components | |
| Saddle | Size: 49, 52 - Bontrager Verse Comp, steel rails, 155 mm width Size: 54, 56, 58 - Bontrager Verse Comp, steel rails, 145 mm width |
| Seatpost | Bontrager alloy, 27.2 mm, 12 mm offset, 330 mm length |
| Handlebar | Size: 49 - Bontrager Elite Gravel, 38 cm width Size: 52 - Bontrager Elite Gravel, 40 cm width Size: 54, 56 - Bontrager Elite Gravel, 42 cm width Size: 58 - Bontrager Elite Gravel, 44 cm width |
| Handlebar Tape | Bontrager Supertack Perf tape |
| Stem | Size: 49 - Bontrager Elite, 31.8 mm, Blendr-compatible, 7-degree, 70 mm length Size: 52, 54 - Bontrager Elite, 31.8 mm, Blendr-compatible, 7-degree, 80 mm length Size: 56, 58 - Bontrager Elite, 31.8 mm, Blendr-compatible, 7-degree, 90 mm length |
| Brake | Tektro C550 mechanical disc brake, dual piston, flat mount |
| Brake Rotor | Tektro, CentreLock, 160 mm |
| Rotor Size | Max brake rotor sizes: 160 mm front and rear |
How tall are you?
To measure your height, stand up straight, barefoot, with your back, heels, shoulders and head all touching a wall. While looking straight ahead, place a book or straight edge on your head and slowly push it against the wall. Your straight edge should be parallel with the floor. Mark the spot where the bottom of the book is touching the wall. The distance from the marked spot to the floor is your height.
What is your inside leg?
How to measure: Stand barefoot with your back straight and against a wall. Tuck a ruler or something that extends to the floor between your legs. Using both hands, and keeping it level, pull the ruler up into your crotch as if you were sitting on the saddle. Measure the distance from the top edge of the ruler to the ground to find your inside leg measurement. Your inside leg is very important to your final bike size so please measure carefully.
| Size | 49 | 52 | 54 | 56 | 58 | 61 |
| Rider Height | 156 - 163 cm 5'1" - 5'4" |
163 - 168 cm 5'4" - 5'6" |
168 - 174 cm 5'6" - 5'9" |
174 - 180 cm 5'9" - 5'11" |
180 - 185 cm 5'11" - 6'1" |
185 - 191 cm 6'1" - 6'3" |
| Inseam | 74 - 77 cm 29" - 30" |
76 - 79 cm 30" - 31" |
78 - 82 cm 31" - 32" |
81 - 85 cm 32" - 33" |
84 - 87 cm 33" - 34" |
86 - 90 cm 34" - 35" |
Sizing table
| Frame size number | 49 cm | 52 cm | 54 cm | 56 cm | 58 cm |
| Wheel size | 700c | 700c | 700c | 700c | 700c |
| A — Seat tube | 49 | 52 | 54 | 56 | 58 |
| B — Seat tube angle | 74.1° | 73.7° | 73.2° | 72.8° | 72.5° |
| C — Head tube length | 9 | 10.5 | 12.5 | 14.5 | 16.5 |
| D — Head angle | 71.2° | 71.6° | 71.8° | 72.2° | 72.3° |
| E — Effective top tube | 54.1 | 55.5 | 57 | 58.4 | 59.7 |
| G — Bottom bracket drop | 7.8 | 7.8 | 7.6 | 7.6 | 7.4 |
| H — Chainstay length | 43.5 | 43.5 | 43.5 | 43.5 | 43.5 |
| I — Offset | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 |
| J — Trail | 7.4 | 7.1 | 7 | 6.7 | 6.6 |
| K — Wheelbase | 102.5 | 103.3 | 104.1 | 104.8 | 105.8 |
| L — Standover | 73.5 | 76.5 | 78.9 | 80.9 | 82.9 |
| M — Frame reach | 39.3 | 39.9 | 40.3 | 40.7 | 41.1 |
| N — Frame stack | 53.8 | 55.3 | 57.1 | 59.2 | 60.9 |
| Stem length | 70 | 80 | 80 | 90 | 90 |
