What headset does a Factor Ostro VAM (2021 on) use?
The headset fitment standard on a Factor Ostro VAM (2021 on), and how to pick the right part.
This frame's fitment
| Frame | Factor Ostro VAM (2021 on) |
|---|---|
| Headset standard | IS42 (integrated, 42 mm) |
| Cup / bearing outside diameter | 41.8 to 42.0 mm bearing outside diameter |
| Steerer diameter | 28.6 mm (1 1/8 in) |
The Factor Ostro VAM uses an integrated IS42 upper headset, a 27.2 mm class seatpost, a 12x100 front thru-axle and a braze-on front derailleur.
The Ostro uses a proprietary aero post; confirm the exact part. The bottom bracket is a threaded T47 shell, covered on its own page.
The part to buy
Search Amazon for IS42 for your Factor Ostro VAM (2021 on)affiliate searchFind IS42 for your Factor Ostro VAM (2021 on) on eBayaffiliate
Related fitment pages
IS42integrated, 42 mmBottom bracket for Factor Ostro VAM (2021 on)same frame, BB shellSeatpost diameter on a Factor Ostro VAM (2021 on)same frameIS42 on a Trek Emonda SLR (2024 on)same standard, another frame
SOURCES: Park Tool, Standardized Headset Identification System (SHIS) · BikeGremlin, Bicycle headset bearing standards (SHIS) · BikeRadar, Road bike axle standards: the complete guide