2023 CHAPTER2 AO Base

	XS	S	M	L	XL
Stack	521mm	548mm	576mm	605mm	634mm
Reach	355mm	366mm	377mm	388mm	399mm
Stack to Reach Ratio	1.47:1	1.5:1	1.53:1	1.56:1	1.59:1
Seat Tube Length, C-T	460mm	480mm	500mm	530mm	560mm
Top Tube Length, Effective/Horizontal HT Top	509mm	528mm	547mm	567mm	587mm
Top Tube Slope	9.4deg	9.9deg	10.5deg	10.2deg	9.9deg
Head Tube Angle	69deg	70deg	71deg	72deg	72deg
Seat Tube Angle	73.5deg	73.5deg	73.5deg	73.5deg	73.5deg
Head Tube Length	105mm	130mm	155mm	179mm	209mm
Bottom Bracket Drop	74mm	74mm	74mm	74mm	74mm
Bottom Bracket Height	272mm	272mm	272mm	272mm	272mm
Chainstay Length	420mm	420mm	420mm	420mm	420mm
Chainstay Length Horizontal	413.4mm	413.4mm	413.4mm	413.4mm	413.4mm
Front-Center	589mm	601mm	612mm	617mm	638mm
Front-Center Horizontal	584.6mm	596.6mm	607.6mm	612.6mm	632.6mm
Wheelbase	998mm	1010mm	1021mm	1026mm	1046mm
Fork Offset/Rake	55mm	55mm	55mm	50mm	50mm
Fork Length, Unknown	399mm	399mm	399mm	399mm	399mm
Trail	73.9mm high	67.4mm high	61mm mid/neutral	59.9mm mid/neutral	59.9mm mid/neutral
Mechanical Trail	69mm	63.3mm	57.7mm	56.9mm	56.9mm
Wheel Flop	24.7mm	21.7mm	18.8mm	17.6mm	17.6mm
Standover Height	740mm	764mm	790mm	820mm	849mm
Tire to Pedal Spindle	73mm 170 mm cranks	85mm 170 mm cranks	96mm 170 mm cranks	101mm 170 mm cranks	122mm 170 mm cranks
Pedal Spindle to Ground Clearance	102mm 170 mm cranks	102mm 170 mm cranks	102mm 170 mm cranks	102mm 170 mm cranks	102mm 170 mm cranks

Published Sizing Recommendations

Height

—

165 cm

175 cm

10 cm

180 cm

175 cm

185 cm

180 cm

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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