Name: 2026 Sour Bicycles Purple Haze Base
Brand: Sour Bicycles

	XS	S	M	L	XL	XXL
Stack	566.3mm	574.6mm	583.9mm	602.1mm	628.5mm	647.5mm
Reach	375mm	380mm	385mm	390mm	393.8mm	397mm
Stack to Reach Ratio	1.51:1	1.51:1	1.52:1	1.54:1	1.6:1	1.63:1
Seat Tube Length, C-T	430mm	480mm	510mm	540mm	570mm	590mm
Top Tube Length, Effective/Horizontal Unknown	525mm	535mm	552mm	568mm	583mm	602mm
Top Tube Slope	17.3deg	12.4deg	10.1deg	8.8deg	8.5deg	8.4deg
Head Tube Angle	70.5deg	70.5deg	70.5deg	71.5deg	71.5deg	71.5deg
Seat Tube Angle	75deg	74.5deg	74deg	73.5deg	73deg	72.5deg
Head Tube Length	120mm	135mm	145mm	160mm	190mm	210mm
Bottom Bracket Drop	72mm	72mm	72mm	72mm	70mm	70mm
Bottom Bracket Height	289mm	289mm	289mm	289mm	291mm	291mm
Chainstay Length	440mm	440mm	440mm	440mm	440mm	440mm
Chainstay Length Horizontal	434.1mm	434.1mm	434.1mm	434.1mm	434.4mm	434.4mm
Front-Center	606.2mm	614.2mm	618.1mm	622.1mm	628.5mm	641.4mm
Front-Center Horizontal	601.9mm	609.9mm	613.9mm	617.9mm	624.6mm	637.6mm
Wheelbase	1036mm	1044mm	1048mm	1052mm	1059mm	1072mm
Fork Offset/Rake	45mm	45mm	45mm	45mm	45mm	45mm
Fork Length (Axle-To-Crown)	403mm	403mm	403mm	403mm	403mm	403mm
Trail	80.1mm very high	80.1mm very high	80.1mm very high	73.3mm high	73.3mm high	73.3mm high
Mechanical Trail	75.5mm	75.5mm	75.5mm	69.6mm	69.6mm	69.6mm
Wheel Flop	25.2mm	25.2mm	25.2mm	22.1mm	22.1mm	22.1mm
Tire to Pedal Spindle	72.7mm 172.5 mm cranks	80.7mm 172.5 mm cranks	84.6mm 172.5 mm cranks	88.6mm 172.5 mm cranks	95mm 172.5 mm cranks	107.9mm 172.5 mm cranks
Pedal Spindle to Ground Clearance	116.5mm 172.5 mm cranks	116.5mm 172.5 mm cranks	116.5mm 172.5 mm cranks	116.5mm 172.5 mm cranks	118.5mm 172.5 mm cranks	118.5mm 172.5 mm cranks

	XS	S	M	L	XL	XXL
Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	50mm	50mm	50mm	50mm	50mm	50mm
Tire Width Max	55mm	55mm	55mm	55mm	55mm	55mm
Tire Outer Diameter	722mm	722mm	722mm	722mm	722mm	722mm
Bike Length with Tires	1758mm	1766mm	1770mm	1774mm	1781mm	1794mm
Crank Length	172.5mm	172.5mm	172.5mm	172.5mm	172.5mm	172.5mm
Handlebar Width	400mm	400mm	420mm	420mm	440mm	440mm
Stem Length	70mm	90mm	100mm	100mm	110mm	110mm

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

2026 Sour Bicycles Purple Haze Base

Geometry