The SRAM DUB BB30 Road Wide Bottom Bracket 73mm is designed to connect your crankarms seamlessly, ensuring a smooth transfer of power to your drivetrain. This bottom bracket features the innovative DUB spindle, which is compatible with every bottom bracket standard. This means better crankarm compatibility and enhanced protection from the elements, leading to longer-lasting performance. The SRAM DUB BB30 Road Wide Bottom Bracket 73mm is built to be strong, smooth, and simple, making it an essential component for your bike. Features One oversized spindle compatible with all bottom bracket standards Improved bearing durability ISO 4210 compliant Specifications B-frame interface: BB30 (Road Wide: 73mm) Crank-BB interface: DUB Bearing type: Ceramic Spindle diameter: DUB Spindle length: n/a Chainline: n/a Support E-type FD: n/a Cup material: Aluminum