This is a pack of two optional XRAY 13x19x4mm Rubber Sealed High-Speed Ball Bearings. These high quality ball-bearings are fitted with special rubber covers, and are degreased and lightly filled with special grease for maximum smoothness, long life, highest tolerance and maximum performance.
These ball-bearings have more (and larger) balls inside the cage than the regular ball-bearings, making them much more resilient under loads. The side covers are easy to remove for quick and comfortable servicing.
These ultra-high precision ball bearings are designed to withstand all extremes at the track under racing conditions or even just fun racing.
This product was added to our catalog on May 7, 2008