BB DR 21531 SW-blk | 21.5 x 31 x 14mm Bearing

MR 15307 LLU/LLB CN - ABEC-5, Radial Bearing (CN Clearance) - 15mm x 30mm x 7mm, Radial bearing used as a rear hub bearing in Industry Nine hubs. This ABEC-5 bearing features deep-groove design 52100 High-Carbon Chromium alloy races, with Grade 10 balls, dual-lip, full-contact LLU seals facing outwards to withstand daily abuse of use and the elements, and lighter-contact LLB seals facing inwards to contain the 90% fill with Mobil XHP 222 high pressure water proof grease. CN clearance specification is best for looser press-fit bearing bores. The Enduro line of bearings are available in High-Carbon Chromium Steel, 440C Stainless Steel, Ceramic-Hybrid and XD-15 with Ceramic or Stainless Balls. Our bearings are always engineered with deep groove races to accommodate the largest balls possible. All of our standard bearings feature dual-lip seals that ride in a micro groove creating a full labyrinth to provide ultimate protection against the elements.