The FSA Headset Bearing MR170 is a precision angular contact bearing designed for use in integrated or semi-integrated headsets with 1.5″ steerers and 45°/45° bearing seats. Made from high-quality chrome steel and engineered to exact tolerances, this bearing delivers smooth, reliable, low-friction performance for responsive steering and long service life.

Ideal for mountain bikes and other modern frames with tapered head tubes, this FSA bearing helps eliminate play and roughness in the headset, providing consistent handling feel even over rough terrain.