BMC Roadmachine Four 2021
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Geometry
| 47 | 51 | 54 | 56 | 58 | 61 | |
|---|---|---|---|---|---|---|
| Add to Compare | ||||||
| Reach | 404 | 431 | 341 | 363 | 436 | 321 |
| Stack | 588 | 483 | 515 | 627 | 584 | 531 |
| Top Tube (effective) | 610 | 471 | 648 | 577 | 602 | 670 |
| Seat Tube C-T | 481 | 495 | 483 | 546 | 476 | 505 |
| Head Angle | 71 | 77 | 85 | 61 | 63 | 62 |
| Seat Angle | 62 | 75 | 85 | 74 | 74 | 65 |
| Head Tube | 101 | 123 | 137 | 166 | 233 | 258 |
| Chainstay | 430 | 349 | 369 | 407 | 393 | 432 |
| Wheelbase | 1176 | 1120 | 1086 | 1065 | 1162 | 872 |
| Front Centre | 650 | 670 | 511 | 708 | 697 | 686 |
| BB Drop | 75 | 60 | 81 | 70 | 62 | 81 |
| Fork Rake / Offset | 45 | 48 | 45 | 52 | 49 | 48 |
| Trail | 64 | 72 | 73 | 50 | 61 | 69 |
| Fork Length (A2C) | 388 | 403 | 345 | 318 | 421 | 332 |
| Tyre Max Width | 475 | 461 | 465 | 356 | 482 | 409 |
| Seatpost Length | 270 | 391 | 325 | 417 | 432 | 457 |
| Seatpost Offset | 13 | 17 | 14 | 13 | 15 | 13 |
| Stem Length | 95 | 74 | 115 | 125 | 97 | 115 |
| Stem Angle | ±8 | ±8 | ±8 | ±8 | ±8 | ±8 |
| Crank Length | 157 | 144 | 200 | 205 | 164 | 200 |
| Rider Height | <166 | 166-174 | 172-180 | 178-186 | 184-192 | >190 |
| HB Drop | 107 | 124 | 122 | 103 | 115 | 134 |
| HB Reach | 65 | 65 | 80 | 68 | 80 | 74 |
| 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.
