CeramicSpeed BSA Threaded BB Alpha MTB DUB BlackSave watts and ride faster with guaranteed lowest friction, optimized power transfer, and longest product lifetime Covered by a lifetime warranty Developed to improve upon original Ceramic Speed BB, isolating all elements that make up the design. Each part looked at in detail as a potential for improvement 10% lighter DUB specific cups for right setup with less spacers Stainless steel races for longer durability Refined light contact seals for 500%