2026 Alchemy · MDB
2026 Alchemy Arktos 125 geometry
Full frame geometry for the 2026 Alchemy Arktos 125, 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) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| M | 605 | 471 | 77.8 | 65.8 | 100 | 600 | 410 | 718 | 40 | 768 | 437 | 1206 |
| L | 613.5 | 493.5 | 77.8 | 65.8 | 110 | 625 | 445 | 738 | 40 | 794 | 437 | 1232 |
| XL | 621.5 | 519.3 | 77.8 | 65.8 | 120 | 652 | 490 | 748 | 40 | 823.8 | 437 | 1271.5 |
All measurements in millimetres unless marked (°) for angles.