2023 Sonder Prima Al

	Small	Medium	Large	X-Large
Stack	516.1mm	535.3mm	559.2mm	578.4mm
Reach	375mm	390mm	400mm	405mm
Stack to Reach Ratio	1.38:1	1.37:1	1.4:1	1.43:1
Seat Tube Length, C-T	460mm	500mm	540mm	580mm
Top Tube Length, Effective/Horizontal Center	527.9mm	548.6mm	565.7mm	576.3mm
Top Tube Slope	8.4deg	6deg	4.3deg	2.2deg
Head Tube Angle	73.5deg	73.5deg	73.5deg	73.5deg
Seat Tube Angle	73.5deg	73.5deg	73.5deg	73.5deg
Head Tube Length	110mm	130mm	155mm	175mm
Bottom Bracket Drop	70mm	70mm	70mm	70mm
Bottom Bracket Height	269mm	269mm	269mm	269mm
Chainstay Length	410mm	410mm	410mm	410mm
Chainstay Length Horizontal	404mm	404mm	404mm	404mm
Front-Center	556.4mm	576.9mm	593.9mm	604.5mm
Front-Center Horizontal	552mm	572.6mm	589.7mm	600.4mm
Wheelbase	956mm	976.6mm	993.7mm	1004.4mm
Fork Offset/Rake	45mm	45mm	45mm	45mm
Fork Length (Axle-To-Crown)	370mm	370mm	370mm	370mm
Trail	53.5mm mid/neutral	53.5mm mid/neutral	53.5mm mid/neutral	53.5mm mid/neutral
Mechanical Trail	51.3mm	51.3mm	51.3mm	51.3mm
Wheel Flop	14.6mm	14.6mm	14.6mm	14.6mm
Tire to Pedal Spindle	47.4mm 170 mm cranks	67.9mm 170 mm cranks	84.9mm 170 mm cranks	95.5mm 170 mm cranks
Pedal Spindle to Ground Clearance	99mm 170 mm cranks	99mm 170 mm cranks	99mm 170 mm cranks	99mm 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://alpkit.com/products/prima-al-105-di2?variant=40448964624489

Geometry