Sram bottom bracket DUB BSA 68/73 mm steel

DUB

The ratio, as here the crankshaft and the bearings are dimensioned, is the core of the DUB technology. This is where stiffness and durability meet and complement each other. We have simply thought a little further and have made everything even simpler - through a better integration of all components such as chainring, crank, crankshaft and the bottom bracket. Only this approach, seeing the drivetrain as a complete system, enables the better drivetrain performance.

• Housing width: BSA 68/73 mm
• Bearing shells: CNC milled aluminium
• Bearing: sealed industrial bearing
• Weight: 76 g