SRAM's DUB T47 Bottom Bracket fits in your 85.5mm T47 Threaded bottom shell and provides a stiffer and more durable bottom bracket compared to the competition and SRAM's own GXP design. The DUB system replaces SRAM's previous GXP and BB30 crank and bottom bracket systems to provide improved durability, better compatibility and a stiffer, stronger and lighter product.
