Axial Angular Ball Bearings for Bicycles — headset bearing

The headset bearing ACB are high-quality angular contact ball bearings. They support the fork steerer tube in the bicycle frame at the top and bottom of the head tube and together form the headset. The use of headset bearings is a basic requirement for steering the bicycle, because they enable the fork to be rotatable. Headset bearings absorb enormously high radial and axial forces during steering. Therefore, the lower headset bearing on the fork crown in particular has to be replaced relatively often. The dimensions of the headset bearings are based on the inside diameter of the head tube and the outside diameter of the steerer tube and can be taken over from the already installed bearing that is to be replaced.