The Enduro BSA English threaded bottom bracket with XD-15 Pro bearings. The Enduro BSA English threaded bottom bracket with XD-15 Pro bearings. XD-15 Pro bearings are 15-degree angular contact sealed cartridge bearings with deep-groove bearing raceways that improve longevity and increase ball size Bearings use Grade 3 Silicon Nitride ceramic balls and are sealed on both sides using LLB Nitrile seals Enduro bottom brackets put the bearings at the widest point to increase bearing longevity Includes outer bearing seals and crank spindle spacers to ensure proper chainline and bearing preload
