CeramicSpeed Alpha T47 Threaded Bottom Bracket. Features: Save 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% increased contamination protection without additional drag Improved dustcover design for increased longevity and reduced maintenance T47 bottom brackets utilize the oversized interface of PF30 and EVO386, but with the added benefit of a threaded interface Road: Allround Grease Specs: Model: Alpha Road Spindle Interface: DUB Shell: T47 Internal Shell ID: 47mm Width: 85.5mm Color: Black