The game-changing DUB family goes ceramic. While DUB has been simplifying the game, eliminating compatibility frustration and confusion for years, the DUB ceramic bottom bracket gives riders an additional option for even more silky-smooth performance. This is a whole other level in bottom bracket friction reduction, thanks to its high efficiency, ceramic bearings. What's more, the DUB ceramic bottom bracket can help riders save precious rotational energy without sacrificing the kind of robust seals required for real MTB and road racing scenarios T47 (Road Wide: 85.5mm). High efficiency ceramic bearings save riders rotational energy. Silky smooth, without sacrificing robust seals required for real life durability MTB and racing scenarios. One oversized spindle to work across every bottom bracket standard. Item Specifications: Bottom Bracket Shell I.D.: 47, BB/Frame Interface: T47, BB Shell Width (mm): 85, Weight: 125, Spindle Interface Type: SRAM DUB, Defined Color: Black,