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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	421	385	443	446	389	388
Stack	548	561	651	614	646	753
Top Tube (effective)	557	604	459	531	671	664
Seat Tube C-T	448	484	456	497	558	587
Head Angle	67	71	70	78	80	75
Seat Angle	62	74	83	85	65	81
Head Tube	132	140	162	155	200	235
Chainstay	476	378	482	456	462	433
Wheelbase	975	1144	1011	815	1020	956
Front Centre	523	528	677	532	605	530
BB Drop	77	85	68	68	74	77
Fork Rake / Offset	40	46	49	46	50	49
Trail	67	71	51	54	60	53
Fork Length (A2C)	375	319	394	392	371	306
Tyre Max Width	458	355	500	448	482	519
Seatpost Length	342	318	411	322	381	367
Seatpost Offset	17	16	14	15	15	13
Stem Length	92	103	117	117	88	126
Stem Angle	±8	±8	±8	±8	±8	±8
Crank Length	176	171	205	161	172	179
Rider Height	<166	166-174	172-180	178-186	184-192	>190
HB Drop	112	103	144	128	125	147
HB Reach	83	62	60	70	61	77
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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