Factor Ostro VAM Seatpost - 20mm Setback | Chrome

Is the Ostro VAM Seatpost Right for Your Position?

The Factor Ostro VAM Seatpost with 20mm setback is built exclusively for the OSTRO VAM frame, pairing a proprietary ultra-slim carbon profile with geometry that suits riders who need additional saddle setback for optimal hip alignment, comfortable power output, and a more traditional road position. Like all Ostro VAM seatposts, this one targets aerodynamic efficiency by using a slender shape that disrupts as little airflow as possible in the turbulent zone behind the rider's legs, in full compliance with current UCI aero rules.

The 20mm setback positions the saddle behind the clamp axis, working well for riders with longer torsos, those transitioning from traditional geometry road bikes, or anyone whose bike fit calls for posterior saddle placement to achieve proper knee-over-pedal alignment. Built from high-modulus carbon fiber and finished in chrome, it integrates visually and structurally with the OSTRO VAM for a seamless build. The frame-specific clamp interface ensures correct load transfer and frame protection while maintaining the bike's UCI-approved aerodynamic profile.