FSA No.55 ACS Integrated Tapered Headset - 1.1/8 - 1.5" - BlackFSA No. 55 ACS Integrated Tapered Headset 1. 1 8 1. 5" Black The FSA NO. 55 ACR HBS 180 is a premium integrated headset designed for modern road, gravel and mountain bike frames featuring fully internal cable routing. Engineered for seamless cockpit integration, it works with FSA's ACR (Aerodynamic Cable Routing) system to route cables and hoses cleanly through the headset and into the frame for a sleek, aerodynamic finish. ACR Aerodynamic Cable
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The FSA NO.55 ACR HBS 180 is a premium integrated headset designed for modern road, gravel and mountain bike frames featuring fully internal cable routing. Engineered for seamless cockpit integration, it works with FSA's ACR (Aerodynamic Cable Routing) system to route cables and hoses cleanly through the headset and into the frame for a sleek, aerodynamic finish.
ACR - Aerodynamic Cable Routing: FSA's ACR system routes brake hoses and gear cables internally through the cockpit and frame, creating a cleaner look and improved aerodynamics.
Fully integrated cable routing compatible with FSA ACR systems
Allows unrestricted handlebar rotation with no steering stop limitation
Includes ACR top cover for clean cable integration
Angular Contact Bearings (ACB) for smooth steering performance and durability
Designed specifically for compatible ACR ready frames