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BMC Roadmachine Four 2021

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Geometry

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	47	51	54	56	58	61
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Reach	438	415	400	380	466	337
Stack	604	465	501	553	679	559
Top Tube (effective)	564	594	502	499	456	675
Seat Tube C-T	432	465	478	615	635	478
Head Angle	61	76	64	82	73	85
Seat Angle	65	78	80	65	74	59
Head Tube	95	155	151	161	175	276
Chainstay	407	424	449	347	331	422
Wheelbase	916	1087	1193	999	960	862
Front Centre	557	498	511	567	592	565
BB Drop	83	80	79	70	74	72
Fork Rake / Offset	42	42	52	41	50	49
Trail	58	69	60	68	63	73
Fork Length (A2C)	376	441	311	334	305	403
Tyre Max Width	355	370	338	350	435	354
Seatpost Length	290	398	448	419	416	377
Seatpost Offset	12	14	14	13	15	13
Stem Length	94	86	94	89	119	126
Stem Angle	±8	±8	±8	±8	±8	±8
Crank Length	160	178	181	178	146	146
Rider Height	<166	166-174	172-180	178-186	184-192	>190
HB Drop	103	122	108	149	127	100
HB Reach	63	75	60	73	57	67
Data Source	Manufacturer	Manufacturer	Manufacturer	Manufacturer	Manufacturer	Manufacturer

Measurements are in millimeters and degrees.

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Image showing geometry measurements

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