The Enduro Bearings 6903/29.5 LLB - Ceramic Hybrid offers a smart blend of materials for cyclists seeking performance and value. This bearing combines chromium steel races from Enduro's ABEC 5 range with Grade 5 ceramic balls made of Silicon Nitride (Si3n4), as found in Zero Ceramic bearings. This mix results in a lighter and more efficient bearing, ideal for hubs and bottom brackets. The low contact LLB seals keep out water and dirt without adding friction. Bearing Code: 6903/29.5 Dimensions: 17mm x 29.5mm x 7mm ABEC: 5 Grade: 5 Seals: LLB Grease: Kyodo Yushi PS-2 Application: Hubs, Bottom Brackets Weight: 13.31g Choose the Enduro Bearings 6903/29.5 LLB - Ceramic Hybrid for a reliable and cost-effective solution in your cycling setup.