2025 Brother Cycles · G
2025 Brother Cycles Stroma geometry
Full frame geometry for the 2025 Brother Cycles Stroma, 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) | BB drop (mm) | Chainstay (mm) | Wheelbase (mm) | Fork rake (mm) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| XSmall | 532 | 369 | 74 | 71 | 110 | 510 | 500 | 70 | 420 | 990 | 45 |
| Small | 550 | 377 | 73.5 | 72 | 125 | 526 | 520 | 70 | 420 | 995 | 45 |
| Medium | 563 | 385 | 73 | 72.5 | 140 | 542 | 540 | 70 | 420 | 1002 | 45 |
| Large | 585 | 393 | 73 | 72.5 | 160 | 557 | 560 | 70 | 420 | 1017 | 45 |
| XLarge | 604 | 402 | 73 | 72.5 | 180 | 572 | 580 | 70 | 420 | 1032 | 45 |
All measurements in millimetres unless marked (°) for angles.