Experience superior performance with this precision-engineered hybrid ceramic ball bearing designed specifically for high-speed bicycle applications. The 6806-2RS bearing combines chrome steel rings with advanced silicon nitride ceramic balls, delivering reduced friction and outstanding durability. With dimensions of 30mm inner diameter, 42mm outer diameter, and 7mm width, this thin-section bearing provides seamless compatibility with bike components. The double rubber seal (2RS) configuration offers excellent protection against dust and moisture, while the specialized nylon cage ensures smooth, quiet operation under demanding conditions. The innovative hybrid design merges the strength of steel rings with the lightweight, wear-resistant properties of ceramic balls, making it ideal for serious cyclists seeking enhanced performance. This bearing features premium grease lubrication and maintains reliable operation at high speeds, making it a perfect choice for performance-focused bicycle applications where traditional steel bearings may not suffice.