The new SRAM DUB bottom bracket series has a very simple task: to connect the crank arms while ensuring a durable power transfer in the drivetrain. For this specific requirement, we designed the DUB crankshaft: a single oversized shaft that works with all bottom bracket standards. For better crank compatibility, improved protection against the elements, and long-lasting performance – stable, smooth, and simple. And now, back on the bike!

The combination of crankshaft and bottom bracket is the heart of DUB technology. Here, stiffness meets durability. SRAM's engineers have taken it a step further, making everything even simpler and better. It is primarily the system approach through the integration of chainring, crank, shaft, and bottom bracket that results in improved drivetrain performance.

• Intended use: Road bike
• Details:

• Oversized shaft that works with all bottom bracket standards
• Significantly better sealing due to Gutter Seal Technology
• Much lighter than the GXP system
• Industrially sealed bearings

• Design: Hollow axle
• Frame compatibility: BB386Evo bottom bracket
• Design: Press-fit bearing cups
• Axle interface: DUB (28.8 mm).