Experience superior performance with this premium 6806 2RS hybrid ceramic ball bearing, featuring a 30mm inner diameter, 42mm outer diameter, and 7mm width. The chrome steel rings combined with black ceramic (silicon nitride) balls deliver exceptional durability and reduced friction for high-speed applications. The bearing's red rubber seals on both sides protect against dust and debris while maintaining proper lubrication. The nylon cage ensures smooth operation and proper ball spacing. This thin-section bearing is ideal for precision applications like high-performance bicycles where reliability is crucial. The hybrid ceramic construction offers reduced weight and excellent wear resistance compared to traditional steel bearings. Pre-lubricated with high-quality grease, this bearing is ready for immediate installation and designed for long-lasting performance in demanding conditions. Perfect for applications requiring precise rotation and minimal friction.