608-2RS Sealed Ball Bearing Si3N4 Ceramic Balls 8mm x 22mm x 7mm 608-2RS Sealed Ball Bearing, Bearing with Ceramic Balls with Rubber sealed, balls are made of Ceramic Si3N4 (Silicon Nitride), each bearing has 2 Rubber seal to protect the bearing from dust or any possible contamination, bearing is self lubricated.

608-2rs bearing dimensions

The Generation 3 hub and bearing assembly is an integrated bearing assembly that offers design flexibility and bolt-on simplicity and features active sensing technology. Generation 3 improves stiffness and brake performance, reduces weight and envelope size, lowers assembly costs and reduces warranty claims.