TREK Checkpoint ALR 3 Gen 3

Checkpoint ALR 3 is an adventure-ready aluminum gravel bike built for exploring beyond the pavement. Its modern endurance geometry helps keep you comfortable on rough roads and long rides, while the full-carbon fork helps smooth out road chatter and potholes. With clearance for tires up to 50 mm, 10-speed Shimano CUES shifting, mechanical disc brakes and mounts for bags and gear, it’s ready for gravel detours and weekend escapes.

FRAMESET

Frame: 300 Series Alpha Aluminum with internal cable routing, 3S chain keeper, T47, UDH, rack and fender mounts, integrated frame bag mounts, flat-mount disc and 142 × 12 mm chamfered thru axle.

Fork: Trek Checkpoint full carbon with tapered steerer, rack and fender mounts, flat-mount disc and 12 × 100 mm thru axle.

WEIGHT

Weight: ML — 10.41 kg / 22.96 lb (with TLR sealant, no tubes).

Weight limit: Maximum total weight of 275 lb (125 kg), including bicycle, rider and cargo.

DRIVETRAIN

Shifter: Shimano CUES 10-speed right STU303010R.

Rear derailleur: Shimano CUES U6000 GS.

Crank: Shimano CUES FCU60301 with 40T ring.
• XS, S: 165 mm length
• M, ML: 170 mm length
• L, XL: 172.5 mm length

Bottom bracket: Praxis T47 threaded, internal bearing.

Cassette: Shimano CUES LG300 LINKGLIDE, 11–48, 10-speed.

Chain: Shimano LG500.

Maximum chainring size: 1x: 44T; 2x: 46/30T.

WHEELS

Front hub: Bontrager alloy, sealed bearing, Centerlock disc, 100 × 12 mm thru axle.

Front axle: Bontrager Switch chamfered thru axle.

Rear hub: Bontrager alloy, sealed bearing, Centerlock disc, Shimano 11-speed freehub, 142 × 12 mm thru axle.

Rear axle: Bontrager Switch chamfered thru axle.

Rim: Bontrager Paradigm 23, Tubeless Ready, 24-hole, 23 mm width, Presta valve.

Spokes: 14g stainless steel, black.

Tire: Bontrager Girona Comp, wire bead, 60 TPI, 700 × 42 mm.

Maximum tire size: 50 mm without fenders; 42 mm with fenders. Sizes are as measured; see the manual for details.

COMPONENTS

Saddle: Verse Short Comp, steel rails, 145 mm width.

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

Handlebar:
• XS, S: Bontrager Elite Gravel alloy, 40 cm width
• M, ML: Bontrager Elite Gravel alloy, 42 cm width
• L: Bontrager Elite Gravel alloy, 44 cm width
• XL: Bontrager Elite Gravel alloy, 46 cm width

Handlebar tape: Trek gel cork (listed for sizes XS, S, M and ML).

Geometry

All measurements provided in cm unless otherwise stated.

Sizing table

Frame size letter	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
XS	700c	44.5	74.1°	9.6	71.2°	53.6	7.8	43.5	4.9	7.4	102.5	73.5	38.0	54.5
S	700c	48.0	73.7°	11.7	71.6°	54.8	7.8	43.5	4.9	7.1	103.3	76.5	38.5	56.6
M	700c	50.5	73.2°	14.0	71.8°	56.8	7.6	43.5	4.9	7.0	104.1	78.9	39.1	58.9
ML	700c	53.0	72.8°	16.2	72.2°	58.0	7.6	43.5	4.9	6.7	104.8	80.9	39.7	61.1
L	700c	55.0	72.5°	18.1	72.3°	59.2	7.4	43.5	4.9	6.6	105.8	82.9	40.2	63.0
XL	700c	57.5	72.1°	20.1	72.6°	60.4	7.4	43.5	4.9	6.5	107.0	85.9	40.8	65.0