Ceramic Hybrid 2RS Bearings 608-6902-6806-Etc Chrome Steel Race With Si3N4 Balls

Silicone nitride ( ceramic Si3N4 ). 2RS Cycle Bearings. OEM spec 2RS bearings. Each Hybrid Ceramic 2RS. Hybrid Ceramic Uprgrade. --- Ceramic Hybrid ---. bearing balls in case. --- Hybrid Ceramic Bearings ---.