Gravel
Mason Exposure
2025 · 650b wheels · 8 sizes
Italian-made Dedacciai steel bikepacking and adventure frame with UDH-compatible dropouts and a Mason RangeFinder AS carbon fork. It runs 650b or 700c wheels; the geometry is listed as Mason publishes it. Stand-over and trail are quoted for 650b x 47mm tyres on the 48cm and 650b x 55mm tyres on all other sizes. Mason also lists trail for other tyres: on the 54cm, for example, it is 71.5 mm with 650b x 47mm, 73.8 mm with 700c x 35mm and 78.7 mm with 700c x 50mm. Stem, crank and bar sizes are Mason's recommended component sizes for complete builds.
Source: masoncycles.cc/products/exposure-frameset
I ride:
Size run
Published geometry by size. How each size rides and fits for your rider profile loads with the page.
| Size | 48cm | 50cm | 52cm | 54cm | 56cm | 58cm | 60cm | 62cm |
|---|---|---|---|---|---|---|---|---|
| Stack (mm) | 536 | 550 | 566 | 578 | 590 | 604 | 628 | 644 |
| Reach (mm) | 360 | 360 | 371 | 375 | 380 | 393 | 396 | 404 |
| Head angle (°) | 69.5 | 69.5 | 70.0 | 70.0 | 70.5 | 71.0 | 71.0 | 71.5 |
| Seat angle (°) | 74.0 | 74.0 | 74.0 | 73.0 | 73.0 | 72.5 | 72.5 | 72.5 |