2026 Polygon · MDB
2026 Polygon Siskiu T geometry
Full frame geometry for the 2026 Polygon Siskiu T, 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) | Chainstay (mm) | Wheelbase (mm) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| S | 604 | 440 | 71.2 | 64.5 | 89 | 568 | 390 | 704 | 39 | 430 | 1186 |
| M | 609 | 465 | 71.2 | 64.5 | 95 | 595 | 400 | 705 | 39 | 430 | 1214 |
| L | 622 | 485 | 71.2 | 64.5 | 110 | 619 | 415 | 711 | 39 | 432 | 1240 |
| XL | 636 | 505 | 71.2 | 64.5 | 125 | 644 | 430 | 723 | 39 | 430 | 1267 |
All measurements in millimetres unless marked (°) for angles.