SRAM DUB BB30 Road Bottom Bracket is designed to connect your crankarms seamlessly while ensuring smooth power transfer to your drivetrain. This bottom bracket features the innovative DUB spindle, which is a single oversized component that fits all bottom bracket standards. This design enhances crankarm compatibility and offers better protection against the elements, ensuring long-lasting performance. Features One oversized spindle compatible with all bottom bracket standards Enhanced bearing durability ISO 4210 compliant Specifications BB-frame interface: BB30, BB30 (Road Wide: 68mm), BB30 (Road Wide: 73mm), BB30 (Road: 73mm), BB30 83-A Crank-BB interface: DUB Bearing type: Ceramic, Standard Spindle diameter: DUB Spindle length: n/a Chainline: n/a Support E-type FD: n/a Cup material: Aluminum With the SRAM DUB BB30 Road Bottom Bracket, you get a stronger, smoother, and simpler solution for your bike's drivetrain needs. Enjoy a ride with improved performance and reliability.