2009 Surly Bikes 1x1 Base

	X-Small	Small	Medium	Large	X-Large
Stack	489.1mm	511.2mm	520.2mm	537.7mm	558.1mm
Reach	394.2mm	407.4mm	424.7mm	434.3mm	443.1mm
Stack to Reach Ratio	1.24:1	1.25:1	1.22:1	1.24:1	1.26:1
Seat Tube Length, C-T	355.6mm	406.4mm	457.2mm	508mm	558.8mm
Top Tube Length, Effective/Horizontal Center	545mm	565mm	585mm	600mm	615mm
Top Tube Length, Effective/Horizontal Unknown	545mm	565mm	585mm	600mm	615mm
Top Tube Length, Actual C-C	521.2mm	541.6mm	565.8mm	586.5mm	608.3mm
Top Tube Slope	16.6deg	13.1deg	8.4deg	5.1deg	2.2deg
Head Tube Angle	71deg	71deg	71deg	71deg	71deg
Seat Tube Angle	73deg	73deg	73deg	73deg	73deg
Head Tube Length	89mm	102mm	114mm	134mm	159mm
Bottom Bracket Drop	42.5mm	42.5mm	42.5mm	42.5mm	42.5mm
Bottom Bracket Height	295.5mm	295.5mm	295.5mm	295.5mm	295.5mm
Chainstay Length	419mm	419mm	419mm	419mm	419mm
Chainstay Length Horizontal	416.8mm	416.8mm	416.8mm	416.8mm	416.8mm
Front-Center	598.2mm	618.6mm	638.9mm	654.6mm	670.3mm
Front-Center Horizontal	596.7mm	617.2mm	637.5mm	653.3mm	669mm
Wheelbase	1013.5mm	1034mm	1054.3mm	1070.1mm	1085.8mm
Fork Offset/Rake	45mm	45mm	45mm	45mm	45mm
Fork Length (Axle-To-Crown)	413mm	413mm	413mm	413mm	413mm
Trail	68.8mm high	68.8mm high	68.8mm high	68.8mm high	68.8mm high
Mechanical Trail	65mm	65mm	65mm	65mm	65mm
Wheel Flop	21.2mm	21.2mm	21.2mm	21.2mm	21.2mm
Standover Height	714.9mm	742.9mm	773.8mm	806.9mm	841.6mm
Tire to Pedal Spindle	90.2mm 170 mm cranks	110.6mm 170 mm cranks	130.9mm 170 mm cranks	146.6mm 170 mm cranks	162.3mm 170 mm cranks
Pedal Spindle to Ground Clearance	125.5mm 170 mm cranks	125.5mm 170 mm cranks	125.5mm 170 mm cranks	125.5mm 170 mm cranks	125.5mm 170 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.

Category Trend

Source:https://ja.surlybikes.com/uploads/downloads/Surly_Cat_2009_web.pdf

Geometry