Trek Checkpoint ALR 4

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.

Features:

Frameset

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.

Weight

56 - 9.91 kg / 21.85 lbs (with TLR sealant, no tubes)

This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 275 pounds (125 kg).

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, 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

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

Front Hub: Bontrager alloy, sealed bearing, centerlock disc, 100x12mm thru axle

Front Skewer: Bontrager Switch thru axle, removable lever

Rear Hub: Bontrager alloy, sealed bearing, centerlock disc, Shimano 11-speed freehub, 142x12mm thru axle

Rear Skewer: Bontrager Switch thru axle, removable lever

Rim: Bontrager Paradigm, Tubeless Ready, 24-hole, 21mm width, Presta valve

Spokes: 14g stainless steel, black

Tire: Bontrager GR1 Team Issue, Tubeless Ready, Inner Strength casing, aramid bead, 120 tpi, 700x40mm, Bontrager Girona Pro, Tubeless Ready, GR puncture protection, aramid bead, 60 tpi, 700x42mm

Rim Strip: Bontrager TLR

Components

Saddle: Size 49, 52: Bontrager Verse Comp, steel rails, 155mm width

Saddle: Size 54, 56, 58, 61: Bontrager Verse Comp, steel rails, 145mm width

Seatpost: Bontrager alloy, 27.2mm, 12mm offset, 330mm length

Handlebar

• 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

Handlebar Tape: 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

Brake: Tektro C550 mechanical disc brake, dual piston, flat mount

Brake Rotor: Tektro, centerlock, 160mm

Rotor Size: Max brake rotor sizes: 160mm front & rear