The Sram DUB bottom bracket has an internal diameter of 28.99 mm and is only compatible with DUB axles.

• Material: Aluminum / Steel
• Compatible with Cannondale 83 mm crankset
• Internal frame diameter: 42 mm
• Weight: 71 g
• Model: 00.6418.027.001 / AM BB DUB BB30 (Road) 83 mm Cannondale-AI

If your bike creaks when you press hard on the pedals, or if the crankset movement has lost its fluidity or developed play, it may be time to change your bottom bracket. Like all components of your bike, the bottom bracket and its bearings are subject to wear.

Replacing it is a straightforward task if properly prepared, though the variety of standards for bearings, bottom brackets, and frames can be overwhelming. The bottom bracket serves as the interface between your crankset and frame, so it's essential to identify which crankset you want to fit into which frame.

Specifications:

• Crank width: 83 mm
• Case standard: BB30
• Internal case diameter: 42 mm
• Bearing quality: Stainless steel
• Bottom bracket axle: 28.99 mm
• Crankset standard: Sram DUB.