2015 Surly Bikes 1x1 Base

	xSmall	Small	Medium	Large	xLarge
Stack	551mm	560.5mm	569.9mm	584.1mm	603mm
Reach	376.5mm	398.6mm	420.8mm	436.4mm	445.6mm
Stack to Reach Ratio	1.46:1	1.41:1	1.35:1	1.34:1	1.35:1
Seat Tube Length, C-TTT	355.6mm	406.4mm	457.5mm	508.8mm	558.8mm
Top Tube Length, Effective/Horizontal Center	546mm	571mm	596mm	616mm	631mm
Top Tube Length, Actual C-C	532mm	549mm	570mm	590mm	608.3mm
Top Tube Slope	6deg	11.1deg	16.3deg	13.8deg	9.7deg
Head Tube Angle	71deg	71deg	71deg	71deg	71deg
Seat Tube Angle	73deg	73deg	73deg	73deg	73deg
Head Tube Length	90mm	100mm	110mm	125mm	145mm
Bottom Bracket Drop	40mm	40mm	40mm	40mm	40mm
Bottom Bracket Height	309.4mm	309.4mm	309.4mm	309.4mm	309.4mm
Chainstay Length	419mm	419mm	419mm	419mm	419mm
Chainstay Length Horizontal	417.1mm	417.1mm	417.1mm	417.1mm	417.1mm
Front-Center	596.2mm	621.5mm	646.8mm	667.3mm	682.9mm
Front-Center Horizontal	594.8mm	620.2mm	645.5mm	666.1mm	681.7mm
Wheelbase	1011.9mm	1037.3mm	1062.6mm	1083.2mm	1098.8mm
Fork Offset/Rake	40mm	40mm	40mm	40mm	40mm
Fork Length (Axle-To-Crown)	453mm	453mm	453mm	453mm	453mm
Trail	78mm high	78mm high	78mm high	78mm high	78mm high
Mechanical Trail	73.7mm	73.7mm	73.7mm	73.7mm	73.7mm
Wheel Flop	24mm	24mm	24mm	24mm	24mm
Standover Height	717mm	745mm	774mm	804mm	838mm
Tire to Pedal Spindle	76.8mm 170 mm cranks	102.2mm 170 mm cranks	127.4mm 170 mm cranks	148mm 170 mm cranks	163.5mm 170 mm cranks
Pedal Spindle to Ground Clearance	139.4mm 170 mm cranks	139.4mm 170 mm cranks	139.4mm 170 mm cranks	139.4mm 170 mm cranks	139.4mm 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://surlybikes.com/bikes/legacy/1x1/1x1/geometry

Geometry