Trek Checkpoint ALR 3

Name: Trek Checkpoint ALR 3
Brand: Trek

2026 RoadGravel Manufacturer page

Trek Checkpoint ALR 3, color Dark Carmine

Price: Not published

Prices shown first for United States
Europe: €1,299 Last known price
Suspension: Rigid
Wheels: 700c
Drivetrain: 1 × 10 40t / 11–48t
Gear range: 436%
Weight: 10.41 kg 23.0 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Mechanical disc

Rider height by size (cm)

Size guide

XS 155–168
SM 163–174
MD 170–181
MD/LG 175–187
LG 181–193
XL 188–200

Components

17 of 19 identified

Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.

Frame and fork

1 part

Frame

300 Series Alpha Aluminium, Internal cable routing, 3S chain keeper, T47, UDH, rack and mudguard mounts, integrated frame bag mounts, flat-mount disc, 142x12 mm chamfered thru axle Not identified

Suspension

1 part

Fork
- Trek

Drivetrain

6 parts

Bottom bracket
- Praxis
Cassette
- Shimano CS-LG300-10 10 speeds
CS-LG300-10
Chain
- Shimano CN-LG500
CN-LG500
Crankset
- Shimano Cues FC-U6030-1 11 speeds 40t
FC-U6030
Rear derailleur
- Shimano Cues RD-U6000 11 speeds
RD-U6000
Shifters
- Shimano Cues ST-U3030-10R 10 speeds
ST-U3030-10R

Brakes

2 parts

Wheels and tires

5 parts

Front hub
- Bontrager
Rear hub
- Bontrager
Rims
- Bontrager
Spokes

14 g stainless steel, black Not identified
Tires
- Bontrager

Cockpit and contact points

4 parts

Sizes and geometry

6 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 391mm

Stack 589mm

Wheelbase 1041mm

Head angle 71.8°

Seat angle 73.2°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 700c wheel; exact published values are in the table below.

Size Reported by the manufacturer

Complete manufacturer geometry table 6 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	380	385	391	397	402	408
Stackmm	545	566	589	611	630	650
Top tube lengthmm	536	548	568	580	592	604
Seat tube lengthmm	490	520	540	560	580	610
Head tube lengthmm	96	117	140	162	181	201
Head tube angle	71.2°	71.6°	71.8°	72.2°	72.3°	72.6°
Seat tube angle	74.1°	73.7°	73.2°	72.8°	72.5°	72.1°
Chainstay lengthmm	435	435	435	435	435	435
Wheelbasemm	1025	1033	1041	1048	1058	1070
Front centermm	602	610	617	624	634	646
Bottom bracket dropmm	78	78	76	76	74	74
Bottom bracket heightmm	271	271	273	273	275	275
Standover heightmm	735	765	789	809	829	859
Fork rakemm	55	55	50	48	48	50
Trailmm	74	71	70	67	66	65
Stack/reach ratio	1.43	1.47	1.51	1.54	1.57	1.59

Not published by the manufacturer: Front travel, Rear travel, Crank length, Handlebar width, Stem length, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum
Fork material: Carbon
Bicycle weight: 10.41 kg

23.0 lb
Weight limit: 125 kg

275.6 lb

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 40
Largest chainring: 40
Rear sprockets: 10
Smallest sprocket: 11
Largest sprocket: 48
Lowest gear: 24.2 in
Highest gear: 105.5 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Mechanical disc

Fit and controls

Derailleur hanger: UDH
Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Bottom bracket standard: T47
Tire clearance: Maximum tire width: 50c
Tire width: 42c
Wheel material: Aluminum
Wheel size: 700c

Technical analysis

3 measures

How these figures sit among bicycles of the same class and model year. Context, not a ranking.

Lowest gear

24.2 gear inches

This value is within the central range for this class.

Cohort: Road / Gravel Model year: 2026
Sample: 1,455 bicycles with this information
Coverage: 73.2% of the class

Highest gear

105.5 gear inches

This value is below the central range for this class.

Cohort: Road / Gravel Model year: 2026
Sample: 1,455 bicycles with this information
Coverage: 73.2% of the class

Shifting

Mechanical

706 of 1,980 bicycles with this information use electronic shifting.

Cohort: Road / Gravel Model year: 2026
Sample: 1,980 bicycles with this information
Coverage: 99.6% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 9.3 km/h
Highest gear: 40.4 km/h

Total gear range 436%

Technical details and class reference

These speeds describe the gearing at the selected cadence, not how fast you can ride.
Calculated from published gear-inch values and their wheel-size assumptions.
These gearing values describe the bicycle, not a selected frame size.
A 100% range means one ratio; 500% means the highest ratio is five times the lowest.
For e-bikes, motor assistance cutoff is not represented.

Gear-inch range

Lower gear-inch values travel less distance per pedal revolution; higher values travel farther.

This bicycle: 24.2–105.5 gear inches
Class reference (p10–p90): 22.8–127.6 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Road / Gravel Model year: 2026
Lowest gear: 1455 bicycles with this information, 73.2% of the class
Highest gear: 1455 bicycles with this information, 73.2% of the class

Lineup changes

The published facts that differ across this family's builds and from the same model a year earlier. Missing information never counts as zero.

Differences across 2026 builds
Specification	This bicycle Trek Checkpoint ALR 3	Trek Checkpoint ALR 3 Gen 3	Trek Checkpoint ALR 4	Trek Checkpoint ALR 4 Gen 3	Trek Checkpoint ALR 5	Trek Checkpoint ALR 5 Gen 3
Frame
Bicycle weight	10.41 kg	10.41 kg	10.4 kg	10.4 kg	9.87 kg	9.87 kg
Drivetrain
Rear sprockets	10	10	11	11	12	12
Largest sprocket	48	48	50	50	44	44
Lowest gear	24.2 in	24.2 in	23.2 in	23.2 in	26.4 in	26.4 in
Brakes
Brake type	Mechanical disc	Mechanical disc	Hydraulic disc	Hydraulic disc	Hydraulic disc	Hydraulic disc

Changes since 2025
Specification	2025 Trek Checkpoint ALR 3	This bicycle Trek Checkpoint ALR 3
Frame
Bicycle weight	10.61 kg	10.41 kg
Drivetrain
Front chainrings	2	1
Smallest chainring	30	40
Largest chainring	46	40
Rear sprockets	9	10
Largest sprocket	32	48
Lowest gear	27.2 in	24.2 in
Highest gear	121.3 in	105.5 in
Cockpit
Derailleur hanger	Not informed	UDH
Other specifications
Tire clearance	Not informed	Maximum tire width: 50c