2024 BMC Switzerland Roadmachine FOUR

	47	51	54	56	58	61
Stack	525mm	550mm	570mm	595mm	620mm	645mm
Reach	370mm	379mm	383mm	388mm	393mm	398mm
Stack to Reach Ratio	1.42:1	1.45:1	1.49:1	1.53:1	1.58:1	1.62:1
Seat Tube Length, C-T	414mm	461mm	488mm	508mm	529mm	550mm
Top Tube Length, Actual C-C	520mm	537mm	546mm	559mm	571mm	581mm
Top Tube Slope	14.7deg	11.9deg	11deg	11.4deg	11.7deg	11.9deg
Head Tube Angle	71.4deg	71.4deg	72.2deg	72.2deg	72.2deg	72.2deg
Seat Tube Angle	74.2deg	74.2deg	74.2deg	74.2deg	74.2deg	74.2deg
Head Tube Length	112mm	138mm	154mm	181mm	207mm	233mm
Bottom Bracket Drop	75mm	75mm	75mm	75mm	75mm	75mm
Bottom Bracket Height	266mm	266mm	266mm	266mm	266mm	266mm
Chainstay Length	415mm	415mm	415mm	415mm	415mm	415mm
Chainstay Length Horizontal	408.2mm	408.2mm	408.2mm	408.2mm	408.2mm	408.2mm
Front-Center	579mm	596mm	594mm	607mm	620mm	633mm
Front-Center Horizontal	573.8mm	591.8mm	588.8mm	601.8mm	614.8mm	627.8mm
Wheelbase	982mm	1000mm	997mm	1010mm	1023mm	1036mm
Fork Offset/Rake	50mm	50mm	45mm	45mm	45mm	45mm
Fork Length (On-Axis)	379mm	379mm	379mm	379mm	379mm	379mm
Trail	62mm mid/neutral	62mm mid/neutral	62.2mm mid/neutral	62.2mm mid/neutral	62.2mm mid/neutral	62.2mm mid/neutral
Mechanical Trail	58.8mm	58.8mm	59.2mm	59.2mm	59.2mm	59.2mm
Wheel Flop	18.7mm	18.7mm	18.1mm	18.1mm	18.1mm	18.1mm
Standover Height	726mm	762mm	786mm	807mm	828mm	849mm
Tire to Pedal Spindle	68mm 170 mm cranks	85mm 170 mm cranks	80.5mm 172.5 mm cranks	93.5mm 172.5 mm cranks	104mm 175 mm cranks	117mm 175 mm cranks
Pedal Spindle to Ground Clearance	96mm 170 mm cranks	96mm 170 mm cranks	93.5mm 172.5 mm cranks	93.5mm 172.5 mm cranks	91mm 175 mm cranks	91mm 175 mm cranks

	47	51	54	56	58	61
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	30mm	30mm	30mm	30mm	30mm	30mm
Tire Width Max	40mm	40mm	40mm	40mm	40mm	40mm
Tire Outer Diameter	682mm	682mm	682mm	682mm	682mm	682mm
Bike Length with Tires	1664mm	1682mm	1679mm	1692mm	1705mm	1718mm
Crank Length	170mm	170mm	172.5mm	172.5mm	175mm	175mm
Handlebar Width	400mm	420mm	420mm	420mm	420mm	440mm
Stem Length	90mm	90mm	100mm	110mm	110mm	120mm
Stem Angle	8deg	8deg	8deg	8deg	8deg	8deg

Published Sizing Recommendations

Height

—

158 cm

174 cm

172 cm

180 cm

178 cm

186 cm

184 cm

192 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://bmc-switzerland.com/collections/roadmachine-road-bikes/products/roadmachine-four-bikes-bmc-24-10605-006#product-geo