FSA ACR Factor Ostro/O2 Vam headset spacer

Upgrade your Factor Ostro/O2 VAM with the FSA ACR Headset Spacer. Engineered for seamless integration with FSA´s Aerodynamic Cable Routing (ACR) system, this precision 3D-printed spacer ensures complete internal cable routing for a cleaner, more aerodynamic cockpit. Its gap-free fit reduces drag and optimizes airflow, contributing to watt savings and a sleek, pro-level aesthetic. Essential for maximizing performance and achieving a truly wind-cheating setup on your Factor frameset, allowing for precise stack height adjustment without compromising aero gains