2021 Boardman Bikes URB 8.9

	S	M	L
Stack	551mm	565mm	584mm
Reach	400mm	419mm	438mm
Stack to Reach Ratio	1.38:1	1.35:1	1.33:1
Seat Tube Length, C-T	450mm	490mm	540mm
Top Tube Length, Effective/Horizontal Center	565mm	590mm	615mm
Top Tube Slope	12.8deg	9.7deg	6.5deg
Head Tube Angle	72deg	72deg	72deg
Seat Tube Angle	73deg	73deg	73deg
Head Tube Length	125mm	145mm	165mm
Bottom Bracket Drop	68mm	68mm	68mm
Bottom Bracket Height	275mm	275mm	275mm
Chainstay Length	425mm	425mm	425mm
Chainstay Length Horizontal	419.5mm	419.5mm	419.5mm
Front-Center	611.2mm	634.6mm	659.6mm
Front-Center Horizontal	607.4mm	631mm	656.1mm
Wheelbase	1026.9mm	1050.5mm	1075.7mm
Fork Offset/Rake	48mm	48mm	48mm
Trail	61mm mid/neutral	61mm mid/neutral	61mm mid/neutral
Mechanical Trail	58mm	58mm	58mm
Wheel Flop	17.9mm	17.9mm	17.9mm
Tire to Pedal Spindle	98.2mm 170 mm cranks	121.6mm 170 mm cranks	146.6mm 170 mm cranks
Pedal Spindle to Ground Clearance	105mm 170 mm cranks	105mm 170 mm cranks	105mm 170 mm cranks

Published Sizing Recommendations

Height	170 cm to 179 cm	177 cm to 183 cm	181 cm to 189 cm
PBH	74 cm to 82 cm	78 cm to 85 cm	82 cm to 89 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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Source:https://www.boardmanbikes.com/gb_en/products/2344-urb-8.9-2021.html