Black Bearing cs 6801 (12x21x5mm) ceramic bearing 2025

The ceramic quality makes it possible to offer lighter bearings, better resistance at very high speeds, and a longer life than standard steel quality. The other major advantage is the much lower friction level, which guarantees better performance and therefore less energy loss during pedalling. It is also more rigidity, more precision, and more resistance to compression. In short, ceramic bearings offer the best performance for cyclists seeking to optimise the operation of their bicycles.

Features

• Silicon nitride balls
• Steel cage
• Treated stainless steel rings for improved mechanical resistance
• Specific grease for ceramic bearings
• Low-friction 2RS seals: waterproof and dustproof
• Internal diameter: 12 mm
• Outer diameter: 21 mm
• Thickness: 5 mm