2022 a2 sp1.1 Base

	Small	Medium	Large	Extra Large
Stack	460mm	493mm	527mm	560mm
Reach	371mm	394mm	416mm	439mm
Stack to Reach Ratio	1.24:1	1.25:1	1.27:1	1.28:1
Seat Tube Length, C-C	500mm	520mm	540mm	580mm
Top Tube Length, Effective/Horizontal Center	469mm	499mm	528mm	558mm
Head Tube Angle	73deg	73deg	73deg	73deg
Seat Tube Angle	78deg	78deg	78deg	78deg
Head Tube Length	53mm	87.5mm	123mm	157.5mm
Bottom Bracket Drop	70mm	70mm	70mm	70mm
Bottom Bracket Height	266mm	266mm	266mm	266mm
Chainstay Length	410mm	410mm	410mm	410mm
Chainstay Length Horizontal	404mm	404mm	404mm	404mm
Front-Center	540mm	573mm	605mm	638mm
Front-Center Horizontal	536mm	568mm	601mm	634mm
Wheelbase	940mm	972mm	1005mm	1038mm
Fork Offset/Rake	43mm	43mm	43mm	43mm
Fork Length (Axle-To-Crown)	367mm	367mm	367mm	367mm
Trail	57.8mm mid/neutral	57.8mm mid/neutral	57.8mm mid/neutral	57.8mm mid/neutral
Mechanical Trail	55.2mm	55.2mm	55.2mm	55.2mm
Wheel Flop	16.2mm	16.2mm	16.2mm	16.2mm
Tire to Pedal Spindle	34mm 170 mm cranks	67mm 170 mm cranks	99mm 170 mm cranks	132mm 170 mm cranks
Pedal Spindle to Ground Clearance	96mm 170 mm cranks	96mm 170 mm cranks	96mm 170 mm cranks	96mm 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://a2bikes.com/products/the-sp-1

Geometry