2026 BMC · MDB
2026 BMC Fourstroke R 01 geometry
Full frame geometry for the 2026 BMC Fourstroke R 01, size by size — stack, reach, angles and tube lengths.
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Geometry by size
| Size | Stack (mm) | Reach (mm) | Seat angle (°) | Head angle (°) | Head tube (mm) | Top tube (mm) | Seat tube (mm) | Standover (mm) | BB drop (mm) | Front centre (mm) | Chainstay (mm) | Wheelbase (mm) | Fork rake (mm) | Trail (mm) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| S | 584 | 437 | 75.6 | 66.5 | 84 | 576 | 420 | 727 | 38 | 711 | 431 | 1140 | 44 | 115 |
| M | 592 | 457 | 75.6 | 66.5 | 93 | 599 | 440 | 727 | 38 | 743 | 431 | 1172 | 44 | 115 |
| L | 600 | 477 | 75.6 | 66.5 | 101 | 623 | 470 | 727 | 38 | 760 | 431 | 1189 | 44 | 115 |
| XL | 615 | 500 | 75.6 | 66.5 | 118 | 651 | 490 | 727 | 38 | 790 | 431 | 1219 | 44 | 115 |
All measurements in millimetres unless marked (°) for angles.