	M	L	XL	XXL
Stack	626mm	637mm	649mm	662mm
Reach	452mm	475mm	500mm	527mm
Stack to Reach Ratio	1.38:1	1.34:1	1.3:1	1.26:1
Seat Tube Length, C-T	405mm	425.3mm	445mm	464mm
Top Tube Length, Effective/Horizontal Center	596.5mm	623.5mm	652.9mm	684.6mm
Top Tube Slope	22.6deg	20.9deg	19.5deg	18.2deg
Head Tube Angle	64.5deg	64.5deg	64.5deg	64.5deg
Seat Tube Angle	70deg	70deg	70deg	70deg
Effective Seat Tube Angle, Unknown	77deg	76.9deg	76.7deg	76.6deg
Head Tube Length	111.4mm	123.6mm	136.9mm	151.3mm
Bottom Bracket Drop	10.4mm	10.4mm	10.4mm	10.4mm
Bottom Bracket Height	364.1mm	364.1mm	364.1mm	364.1mm
Chainstay Length	440mm	440mm	440mm	440mm
Chainstay Length Max	452mm	452mm	452mm	452mm
Chainstay Length Horizontal	439.9mm	439.9mm	439.9mm	439.9mm
Chainstay Length Horizontal Max	451.9mm	451.9mm	451.9mm	451.9mm
Front-Center	787.7mm	816mm	846.8mm	879.9mm
Front-Center Horizontal	788mm	816.3mm	847.1mm	880.2mm
Wheelbase	1227.9mm	1256.2mm	1287mm	1320.1mm
Wheelbase Max	1239.9mm	1268.2mm	1299mm	1332.1mm
Fork Offset/Rake	38.3mm	38.3mm	38.4mm	38.3mm
Fork Length (On-Axis)	576mm	576mm	576mm	576mm
Trail	136.2mm very high	136.2mm very high	136.1mm very high	136.2mm very high
Mechanical Trail	123mm	122.9mm	122.8mm	122.9mm
Wheel Flop	52.9mm	52.9mm	52.9mm	52.9mm
Standover Height	782.5mm	788.9mm	791.5mm	799.1mm
Tire to Pedal Spindle	258.2mm 155 mm cranks	286.5mm 155 mm cranks	312.3mm 160 mm cranks	355.4mm 150 mm cranks
Pedal Spindle to Ground Clearance	209.1mm 155 mm cranks	209.1mm 155 mm cranks	204.1mm 160 mm cranks	214.1mm 150 mm cranks

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.

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2026 Amflow PR Base

Geometry