2021 Surly Bikes Bridge Club 27.5

	XS	SM	MD	LG	XL
Stack	553mm	567mm	576mm	590mm	609mm
Reach	376mm	397mm	419mm	434.5mm	444mm
Stack to Reach Ratio	1.47:1	1.43:1	1.37:1	1.36:1	1.37:1
Seat Tube Length, C-T	335.6mm	406.4mm	457.2mm	508mm	558.8mm
Top Tube Length, Effective/Horizontal HT Top	545mm	570mm	595mm	615mm	630mm
Top Tube Length, Actual C-C	534mm	547.5mm	570mm	591.5mm	610.3mm
Top Tube Slope	26.1deg	19.1deg	14.1deg	10.1deg	7deg
Head Tube Angle	70deg	71deg	71deg	71deg	71deg
Seat Tube Angle	73deg	73deg	73deg	73deg	73deg
Head Tube Length	110mm	120mm	130mm	145mm	165mm
Bottom Bracket Drop	60mm	60mm	60mm	60mm	60mm
Bottom Bracket Height	293mm	293mm	293mm	293mm	293mm
Chainstay Length	435mm	435mm	435mm	435mm	435mm
Chainstay Length Horizontal	430.8mm	430.8mm	430.8mm	430.8mm	430.8mm
Front-Center	604.1mm	619.6mm	645mm	664.9mm	680.8mm
Front-Center Horizontal	601.2mm	616.7mm	642.2mm	662.2mm	678.2mm
Wheelbase	1032mm	1047.5mm	1073mm	1093mm	1109mm
Fork Offset/Rake	43mm	43mm	43mm	43mm	43mm
Fork Length (Axle-To-Crown)	420mm	420mm	420mm	420mm	420mm
Trail	82.7mm very high	76.1mm high	76.1mm high	76.1mm high	76.1mm high
Mechanical Trail	77.7mm	71.9mm	71.9mm	71.9mm	71.9mm
Wheel Flop	26.6mm	23.4mm	23.4mm	23.4mm	23.4mm
Standover Height	709mm	750.5mm	780mm	812mm	845.5mm
Tire to Pedal Spindle	81.2mm 170 mm cranks	96.6mm 170 mm cranks	117mm 175 mm cranks	136.9mm 175 mm cranks	152.9mm 175 mm cranks
Pedal Spindle to Ground Clearance	123mm 170 mm cranks	123mm 170 mm cranks	118mm 175 mm cranks	118mm 175 mm cranks	118mm 175 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/bridge_club

Geometry