2025 OPEN Cycle U.P.PER. 2.0 Base

	XS	S	M	L	XL
Stack	520mm	545mm	570mm	595mm	620mm
Reach	356mm	368mm	380mm	392mm	404mm
Stack to Reach Ratio	1.46:1	1.48:1	1.5:1	1.52:1	1.53:1
Seat Tube Length, C-T	418mm	449mm	483mm	504mm	518mm
Top Tube Length, Effective/Horizontal Center	506mm	525mm	545mm	564mm	584mm
Top Tube Slope	14.1deg	13deg	11.7deg	11.8deg	12.6deg
Head Tube Angle	70deg	71.5deg	71.5deg	72.5deg	72.5deg
Seat Tube Angle	73.5deg	73.5deg	73.5deg	73.5deg	73.5deg
Bottom Bracket Drop	82mm	77mm	75mm	73mm	72mm
Bottom Bracket Height	273mm	278mm	280mm	282mm	283mm
Chainstay Length	425mm	425mm	425mm	425mm	425mm
Chainstay Length Horizontal	417mm	418mm	418.3mm	418.7mm	418.9mm
Front-Center	589mm	590mm	610mm	614mm	634mm
Front-Center Horizontal	583mm	585mm	605.7mm	609.3mm	630.1mm
Wheelbase	1000mm	1003mm	1024mm	1028mm	1049mm
Fork Offset/Rake	63.5mm	57.3mm	56.9mm	50.3mm	50.9mm
Trail	61.6mm mid/neutral	58.3mm mid/neutral	58.7mm mid/neutral	59.2mm mid/neutral	58.6mm mid/neutral
Mechanical Trail	57.9mm	55.3mm	55.7mm	56.5mm	55.9mm
Wheel Flop	19.8mm	17.6mm	17.7mm	17mm	16.8mm
Standover Height	713mm	745mm	777mm	799mm	815mm
Tire to Pedal Spindle	64mm 170 mm cranks	65mm 170 mm cranks	85mm 170 mm cranks	89mm 170 mm cranks	109mm 170 mm cranks
Pedal Spindle to Ground Clearance	103mm 170 mm cranks	108mm 170 mm cranks	110mm 170 mm cranks	112mm 170 mm cranks	113mm 170 mm cranks

Published Sizing Recommendations

Height

—

160 cm

171 cm

169 cm

180 cm

178 cm

191 cm

188 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.

Category Trend

Source:https://opencycle.com/upper-20