Name: 2026 Sour Bicycles Space Cake Base
Brand: Sour Bicycles

	XS	S	M	L	XL
Stack	536mm	554mm	569mm	587mm	599mm
Reach	367mm	361mm	373mm	381mm	384mm
Stack to Reach Ratio	1.46:1	1.53:1	1.53:1	1.54:1	1.56:1
Seat Tube Length, C-T	440mm	490mm	520mm	560mm	590mm
Top Tube Length, Effective/Horizontal HT Top	522mm	535mm	545mm	563mm	578mm
Top Tube Slope	13deg	9.6deg	7.8deg	5.5deg	3.8deg
Head Tube Angle	71deg	71.5deg	71.5deg	72deg	72.5deg
Seat Tube Angle	74deg	73.5deg	73deg	72.5deg	72deg
Head Tube Length	100mm	120mm	135mm	150mm	165mm
Bottom Bracket Drop	76mm	76mm	76mm	76mm	76mm
Bottom Bracket Height	251mm	270mm	270mm	270mm	270mm
Chainstay Length	428mm	428mm	428mm	428mm	428mm
Chainstay Length Horizontal	421.2mm	421.2mm	421.2mm	421.2mm	421.2mm
Front-Center	578.8mm	587.7mm	594.7mm	601.6mm	604.6mm
Front-Center Horizontal	573.8mm	582.8mm	589.8mm	596.8mm	599.8mm
Wheelbase	995mm	1004mm	1011mm	1018mm	1021mm
Fork Offset/Rake	45mm	45mm	45mm	45mm	45mm
Fork Length, Unknown	392mm	392mm	392mm	392mm	392mm
Trail	65mm high	68.3mm high	68.3mm high	65.1mm high	61.9mm mid/neutral
Mechanical Trail	61.5mm	64.8mm	64.8mm	61.9mm	59mm
Wheel Flop	20mm	20.6mm	20.6mm	19.1mm	17.8mm
Tire to Pedal Spindle	81.8mm 170 mm cranks	71.7mm 170 mm cranks	78.7mm 170 mm cranks	85.6mm 170 mm cranks	88.6mm 170 mm cranks
Pedal Spindle to Ground Clearance	81mm 170 mm cranks	100mm 170 mm cranks	100mm 170 mm cranks	100mm 170 mm cranks	100mm 170 mm cranks

Published Sizing Recommendations

Height

155 cm

164 cm

162 cm

172 cm

183 cm

188 cm

196 cm

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://sour.bike/bikes/allroad-gravel/space-cake/

2026 Sour Bicycles Space Cake Base