2019 Thesis Bike OB1 Base (700c)

	XS	S	M	L	XL
Stack	521mm	551mm	571mm	595mm	614mm
Reach	356mm	363mm	378mm	388mm	403mm
Stack to Reach Ratio	1.46:1	1.52:1	1.51:1	1.53:1	1.52:1
Seat Tube Length, C-T	440mm	470mm	500mm	530mm	560mm
Top Tube Length, Effective/Horizontal HT Top	515mm	531mm	547mm	570mm	591mm
Top Tube Slope	11.7deg	11.5deg	10deg	9.2deg	7.9deg
Head Tube Angle	70deg	71deg	72deg	72deg	72deg
Seat Tube Angle	73deg	73deg	73deg	73deg	73deg
Head Tube Length	110mm	138mm	155mm	180mm	200mm
Bottom Bracket Drop	73mm	73mm	73mm	73mm	73mm
Bottom Bracket Height	268mm	268mm	268mm	268mm	268mm
Chainstay Length	420mm	420mm	420mm	420mm	420mm
Chainstay Length Horizontal	413.6mm	413.6mm	413.6mm	413.6mm	413.6mm
Front-Center	578mm	586mm	598mm	616mm	637mm
Front-Center Horizontal	573.4mm	581.4mm	593.4mm	611.4mm	632.4mm
Wheelbase	987mm	995mm	1007mm	1025mm	1046mm
Fork Offset/Rake	51mm	51mm	51mm	51mm	51mm
Fork Length (On-Axis)	385mm	385mm	385mm	385mm	385mm
Trail	69.8mm high	63.5mm mid/neutral	57.2mm mid/neutral	57.2mm mid/neutral	57.2mm mid/neutral
Mechanical Trail	65.6mm	60mm	54.4mm	54.4mm	54.4mm
Wheel Flop	22.5mm	19.5mm	16.8mm	16.8mm	16.8mm
Standover Height	720mm	750mm	775mm	805mm	835mm
Tire to Pedal Spindle	82mm 155 mm cranks	85mm 160 mm cranks	92mm 165 mm cranks	105mm 170 mm cranks	121mm 175 mm cranks
Pedal Spindle to Ground Clearance	113mm 155 mm cranks	108mm 160 mm cranks	103mm 165 mm cranks	98mm 170 mm cranks	93mm 175 mm cranks

Published Sizing Recommendations

Height

5 ft 1 in

5 ft 5 in

5 ft 4 in

5 ft 8 in

5 ft 6 in

5 ft 11 in

5 ft 10 in

6 ft 2 in

6 ft 1 in

6 ft 5 in

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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Source:https://thesis.bike/products/the-ob1-custom