2023 BMC Switzerland 257 AMP AL ONE

	S	M	L	XL
Stack	560mm	590mm	620mm	645mm
Reach	424mm	424mm	425mm	436mm
Stack to Reach Ratio	1.32:1	1.39:1	1.46:1	1.48:1
Seat Tube Length, C-T	480mm	510mm	540mm	570mm
Top Tube Length, Actual C-C	574mm	582mm	591mm	609mm
Top Tube Slope	10deg	9.9deg	9.9deg	9.2deg
Head Tube Angle	70deg	70deg	70deg	70deg
Seat Tube Angle	75deg	75deg	75deg	75deg
Head Tube Length	133mm	165mm	197mm	225mm
Bottom Bracket Drop	67mm	67mm	67mm	67mm
Bottom Bracket Height	281mm	281mm	281mm	281mm
Chainstay Length	440mm	440mm	440mm	440mm
Chainstay Length Horizontal	434.9mm	434.9mm	434.9mm	434.9mm
Front-Center	655mm	665mm	677mm	699mm
Front-Center Horizontal	650.1mm	661.1mm	673.1mm	694.1mm
Wheelbase	1085mm	1096mm	1108mm	1129mm
Fork Offset/Rake	45mm	45mm	45mm	45mm
Fork Length (Axle-To-Crown)	408mm	408mm	408mm	408mm
Trail	78.8mm high	78.8mm high	78.8mm high	78.8mm high
Mechanical Trail	74mm	74mm	74mm	74mm
Wheel Flop	25.3mm	25.3mm	25.3mm	25.3mm
Standover Height	766mm	794mm	819mm	847mm
Tire to Pedal Spindle	137mm 170 mm cranks	147mm 170 mm cranks	159mm 170 mm cranks	181mm 170 mm cranks
Pedal Spindle to Ground Clearance	111mm 170 mm cranks	111mm 170 mm cranks	111mm 170 mm cranks	111mm 170 mm cranks

Published Sizing Recommendations

Height

—

168 cm

180 cm

178 cm

190 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://www.bmc-switzerland.com/eu_en/bmc-257-amp-al-one-23.html