The Enduro Bearings BB386 Torqtite XD-15 Pro Bottom Bracket 24mm is a top choice for cyclists seeking durability and performance. Designed specifically for BB386 framesets and Shimano 24mm cranksets, this bottom bracket is a standout in the Enduro Bearings range. What sets the Enduro Bearings BB386 Torqtite XD-15 Pro Bottom Bracket 24mm apart is its use of XD-15 15° Angular Contact cartridge bearings. These bearings are housed in precision-machined aluminium cups that thread directly into the bottom bracket shell. The XD-15 Pro bearings feature deep-groove raceways, allowing for larger Grade 3 Silicon Nitride ceramic balls. This design enhances contact area, boosting performance and longevity. Manufactured in California, USA, Enduro XD-15 bearings are made with corrosion-proof, cryogenically treated nitrogen steel races. Combined with Silicon Nitride Grade 3 ceramic balls, this setup ensures high performance. Enduro Bearings is confident in their product, offering an unlimited lifetime warranty on both bearings and races. Unlike other bearings, the XD-15 Pro bearings improve with use. As they wear in, the balls smooth the races, enhancing speed and smoothness over time. This makes them a superior choice compared to other ceramic-hybrid bearings, which may slow down with use. Specifications Shell Fitment: BB386 Bearings: XD-15 Ceramic Seal Type: LLB Grease Kluber NBU52 Grease Axle Size: 24mm Warranty: Unlimited Lifetime Enduro Reference Number: BKC-0896 Enduro Bearings offers a wide range of bottom brackets to suit various bicycle types. With over 50 different options, including threaded and press-fit designs, there's a solution for every need. Whether you require a BSA, BSA 30, Italian, or T47 system, Enduro Bearings has you covered.