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The CEMA Steuersatzlager ACB 39 x 30,1 x 6,5 x 45°/45° is a high-quality headset bearing designed to deliver smooth, precise steering performance on a wide range of bicycles. Built around the proven angular contact bearing (ACB) design, it is engineered to handle both radial and axial loads, which are common in modern head tube and fork interfaces. This makes it an ideal replacement bearing for integrated and semi-integrated headsets that use these specific dimensions and 45°/45° contact angles.
Using a dedicated headset bearing like this CEMA model helps restore crisp steering, eliminate play, and reduce unwanted noise in the front end of your bike. The carefully machined races and quality balls provide low-friction rotation and consistent performance, even under hard braking or rough road and trail conditions. It is suitable for use on road, gravel, MTB, and urban bikes that match the bearing size, making it a versatile option for mechanics and home builders alike. Whether you are refreshing a worn-out headset or completing a frame build, this CEMA headset bearing offers reliable durability and long-lasting, smooth steering.
