2019 Surly Bikes Lowside 27.5+ Suspension Fork

	XS	SM	MD	LG	XL
Stack	564.5mm	579.8mm	593.5mm	608mm	622mm
Reach	388mm	403.7mm	419.5mm	435.5mm	451mm
Stack to Reach Ratio	1.45:1	1.44:1	1.41:1	1.4:1	1.38:1
Seat Tube Length, C-T	316mm	366mm	416mm	466mm	516mm
Top Tube Length, Effective/Horizontal HT Top	578mm	598mm	618mm	638mm	658mm
Top Tube Length, Actual C-C	562.4mm	575.6mm	589.7mm	608.5mm	630.4mm
Top Tube Slope	28.5deg	24.1deg	19.8deg	15.9deg	12.2deg
Head Tube Angle	67.3deg	67.4deg	67.5deg	67.5deg	67.6deg
Seat Tube Angle	71.4deg	71.4deg	71.5deg	71.5deg	71.6deg
Head Tube Length	110mm	125mm	140mm	155mm	170mm
Bottom Bracket Drop	35.6mm	36mm	36.4mm	36.7mm	37mm
Bottom Bracket Height	327.5mm	327.1mm	326.7mm	326.4mm	326.1mm
Chainstay Length	425mm	425mm	425mm	425mm	425mm
Chainstay Length Horizontal	423.5mm	423.5mm	423.4mm	423.4mm	423.4mm
Front-Center	654.5mm	675.5mm	697mm	718mm	739mm
Front-Center Horizontal	653.5mm	674.5mm	696.1mm	717.1mm	738.1mm
Wheelbase	1077mm	1098mm	1119.5mm	1140.5mm	1161.5mm
Fork Offset/Rake	42mm	42mm	42mm	42mm	42mm
Fork Length (Axle-To-Crown)	468mm	468mm	468mm	468mm	468mm
Trail	106.4mm very high	105.7mm very high	105mm very high	105mm very high	104.2mm very high
Mechanical Trail	98.1mm	97.6mm	97mm	97mm	96.4mm
Wheel Flop	37.9mm	37.5mm	37.1mm	37.1mm	36.7mm
Standover Height	729mm	755mm	787mm	817mm	848.5mm
Tire to Pedal Spindle	121.3mm 170 mm cranks	142.4mm 170 mm cranks	158.9mm 175 mm cranks	179.9mm 175 mm cranks	200.9mm 175 mm cranks
Pedal Spindle to Ground Clearance	157.5mm 170 mm cranks	157.1mm 170 mm cranks	151.7mm 175 mm cranks	151.4mm 175 mm cranks	151.1mm 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.

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Source:https://surlybikes.com/bikes/lowside

Geometry