FSA

NO.55R Headset, 1-1/8" to 1.5", OD61mm

FSA NO.55R Headset brings modern performance and clean integration to the front end of your ride. Designed for frames with integrated cable routing, this headset keeps cables tucked neatly out of sight for a sleek, aerodynamic look and a smooth, quiet cockpit feel. From long road miles to aggressive trail sessions, it delivers precise steering and lasting durability that serious riders demand.

Built to fit 1-1/8" to 1.5" tapered steerer tubes with a 61mm outer diameter, the NO.55R supports fully internal cable setups—perfect for today’s minimalist designs. Whether upgrading a road bike or dialing in a modern MTB, this headset offers the refined control and clean finish that define a premium build.

• Integrated cable routing for a streamlined, clutter-free cockpit
• Precision-engineered bearings ensure smooth, responsive steering
• Compatible with 1-1/8" to 1.5" tapered forks and 61mm OD head tubes
• Ideal for both road and mountain bike frames with internal cable systems
• FSA quality and reliability built for long-term performance