Road race
Factor Ostro VAM
2025 · 700c wheels · 7 sizes
Second-generation Ostro VAM, Factor's all-round aero race bike, built around the Black Inc integrated aero barstem and wheels optimised for 28 mm tyres. Seven frame sizes from 45 to 61. Factor uses a slacker head angle with more fork offset on the three smallest sizes, a steeper seat tube angle on the 45 and 49, and slightly longer chainstays on the 58 and 61. Factor does not publish an effective top tube length, head tube length or fork length for this frame.
Source: factorbikes.com/bikes/ostro-vam
I ride:
Size run
Published geometry by size. How each size rides and fits for your rider profile loads with the page.
| Size | 45 | 49 | 52 | 54 | 56 | 58 | 61 |
|---|---|---|---|---|---|---|---|
| Stack (mm) | 502 | 503 | 523 | 542 | 565 | 587 | 611 |
| Reach (mm) | 360 | 370 | 376 | 384 | 392 | 401 | 409 |
| Head angle (°) | 71.1 | 71.1 | 72.5 | 72.5 | 73.3 | 73.3 | 73.3 |
| Seat angle (°) | 75.5 | 74.5 | 74.0 | 74.0 | 73.5 | 73.5 | 73.5 |