2026 Trek Bikes Checkpoint ALR Gen 3

	XS	S	M	ML	L	XL
Stack	545mm	566mm	589mm	608mm	630mm	650mm
Reach	380mm	385mm	391mm	397mm	402mm	408mm
Stack to Reach Ratio	1.43:1	1.47:1	1.51:1	1.53:1	1.57:1	1.59:1
Seat Tube Length, C-T	490mm	520mm	540mm	560mm	580mm	610mm
Top Tube Length, Effective/Horizontal Center	536mm	548mm	568mm	580mm	592mm	604mm
Top Tube Slope	8.2deg	7.2deg	7.5deg	7.4deg	7.6deg	6.7deg
Head Tube Angle	71.2deg	71.6deg	71.8deg	72.5deg	72.3deg	72.6deg
Seat Tube Angle	74.1deg	73.7deg	73.2deg	72.8deg	72.5deg	72.1deg
Head Tube Length	96mm	117mm	140mm	162mm	181mm	201mm
Bottom Bracket Drop	78mm	78mm	76mm	76mm	74mm	74mm
Bottom Bracket Height	275mm	275mm	277mm	277mm	279mm	279mm
Chainstay Length	435mm	435mm	435mm	435mm	435mm	435mm
Chainstay Length Horizontal	428mm	428mm	428.3mm	428.3mm	428.7mm	428.7mm
Front-Center	602.1mm	610.1mm	617.4mm	624.3mm	633.7mm	645.6mm
Front-Center Horizontal	597.1mm	605.1mm	612.7mm	619.7mm	629.3mm	641.3mm
Wheelbase	1025mm	1033mm	1041mm	1048mm	1058mm	1070mm
Fork Offset/Rake	49mm	49mm	49mm	49mm	49mm	49mm
Trail	68.4mm high	65.8mm high	64.5mm mid/neutral	59.9mm mid/neutral	61.2mm mid/neutral	59.3mm mid/neutral
Mechanical Trail	64.8mm	62.4mm	61.3mm	57.2mm	58.3mm	56.6mm
Wheel Flop	20.9mm	19.7mm	19.1mm	17.2mm	17.7mm	16.9mm
Standover Height	735mm	765mm	789mm	809mm	829mm	859mm
Tire to Pedal Spindle	79.1mm 170 mm cranks	87.1mm 170 mm cranks	94.4mm 170 mm cranks	101.3mm 170 mm cranks	110.7mm 170 mm cranks	122.6mm 170 mm cranks
Pedal Spindle to Ground Clearance	105mm 170 mm cranks	105mm 170 mm cranks	107mm 170 mm cranks	107mm 170 mm cranks	109mm 170 mm cranks	109mm 170 mm cranks

	XS	S	M	ML	L	XL
Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	42mm	42mm	42mm	42mm	42mm	42mm
Tire Width Max	50mm	50mm	50mm	50mm	50mm	50mm
Tire Outer Diameter	706mm	706mm	706mm	706mm	706mm	706mm
Bike Length with Tires	1731mm	1739mm	1747mm	1754mm	1764mm	1776mm

Very Upright

Somewhat Upright

Average

Somewhat Aggressive

Very Aggressive

The Bike Insights Upright/Aggressive scale is based on analysis of a bike’s proportions relative to similar sized bikes in the same category.

Learn more about the Upright/Aggressive Scale

Category Trend

All-road/Gravel

Source:https://www.trekbikes.com/us/en_US/bikes/bikepacking-touring-bikes/checkpoint/checkpoint-alr/checkpoint-alr-5-gen-3/p/49946/?colorCode=bluelight_teal

Suggest Bike Edit

2026 Trek Bikes Checkpoint ALR Gen 3

Geometry

ALR Gen 3 Build

Stack and Reach vs. Category Trend