BMC Roadmachine Four 2021
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Geometry
| 47 | 51 | 54 | 56 | 58 | 61 | |
|---|---|---|---|---|---|---|
| Add to Compare | ||||||
| Reach | 313 | 403 | 447 | 352 | 344 | 360 |
| Stack | 418 | 542 | 578 | 581 | 565 | 542 |
| Top Tube (effective) | 524 | 488 | 539 | 486 | 527 | 544 |
| Seat Tube C-T | 485 | 473 | 452 | 517 | 638 | 502 |
| Head Angle | 68 | 70 | 59 | 79 | 82 | 69 |
| Seat Angle | 85 | 84 | 85 | 78 | 69 | 87 |
| Head Tube | 107 | 124 | 139 | 145 | 214 | 194 |
| Chainstay | 400 | 475 | 386 | 356 | 481 | 475 |
| Wheelbase | 896 | 1046 | 971 | 880 | 1036 | 909 |
| Front Centre | 476 | 609 | 623 | 532 | 675 | 617 |
| BB Drop | 80 | 68 | 69 | 79 | 78 | 58 |
| Fork Rake / Offset | 53 | 50 | 38 | 45 | 45 | 45 |
| Trail | 58 | 57 | 66 | 74 | 60 | 60 |
| Fork Length (A2C) | 391 | 419 | 392 | 321 | 322 | 443 |
| Tyre Max Width | 324 | 429 | 400 | 423 | 400 | 495 |
| Seatpost Length | 301 | 451 | 333 | 436 | 388 | 488 |
| Seatpost Offset | 16 | 17 | 13 | 13 | 12 | 13 |
| Stem Length | 78 | 91 | 101 | 125 | 106 | 142 |
| Stem Angle | ±8 | ±8 | ±8 | ±8 | ±8 | ±8 |
| Crank Length | 183 | 178 | 196 | 191 | 167 | 176 |
| Rider Height | <166 | 166-174 | 172-180 | 178-186 | 184-192 | >190 |
| HB Drop | 148 | 131 | 145 | 143 | 118 | 146 |
| HB Reach | 77 | 82 | 66 | 64 | 83 | 70 |
| Data Source | Manufacturer | Manufacturer | Manufacturer | Manufacturer | Manufacturer | Manufacturer |
Standard measurements are in millimeters and degrees. The site attempts to recognize and convert other units back to standard - results may vary.
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There is a Tailored Protection™ kit available for this bike.
