FSA Headset Bearing 30.5mm x 41.8mm x 8mm, Chrome Steel, 1-1/8″ x 45/45 (MR121)

The FSA Orbit CF 45×45 is a high-quality integrated headset bearing designed for frames that do not require pressed-in cups. These bearings seat directly into the head tube, providing a clean and efficient interface. This specific 45/45 degree angular contact configuration is standard for Campagnolo-compatible integrated systems, ensuring smooth steering and long-term durability.

Precision-engineered from hardened steel, this 1-1/8″ cartridge bearing features an outer diameter of 41.8mm and an inner diameter of 30.5mm. Its sealed design effectively keeps out road grime and moisture, maintaining a consistent feel even in adverse conditions. It is a reliable replacement part for road, BMX, or mountain bikes utilizing the popular Italian-style integrated headset standard.

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