The two machined aluminum cups thread together ensuring the bottom bracket remains stable in the frame, increasing bearing life, and simplifying maintenance.This means no more creaking, smoother operation, longer bearing life, and really quick bearing replacement.

Specifically designed for installing 30mm spindle cranks in Cannondale PF30A (46mm ID, 73mm wide asymmetrical BB shell) frames.

Bottom Bracket Includes:

• BB Cups with bearings
• 2 – Silicone dust seals
• 2 – 0.5mm crank spindle spacers
• 2 – 1.0mm crank spindle spacers