Praxis Works Conversion Bottom Bracket – BB30 / PF30 / OSBB to Shimano Hollowtech II

Need to run a Shimano Hollowtech II crank in a BB30, PF30, or Specialized OSBB frame? The Praxis Works Conversion Bottom Bracket has you covered. Designed for road (68mm) and MTB (73mm) frames, this bottom bracket provides a rock-solid interface for Shimano cranks while maintaining precise alignment and smooth pedaling performance.

Crafted from forged and machined heat-treated alloy cups, it is engineered for durability and long-term reliability, making it ideal for both high-performance road riding and demanding MTB applications. The conversion BB allows seamless installation without modifying your frame, ensuring your Shimano crank fits securely and spins freely.

Key Features

• Compatibility: BB30, PF30*, or Specialized OSBB frames → Shimano Hollowtech II cranks

• Versions: 68mm (Road) | 73mm (MTB)

• Material: Forged & machined heat-treated alloy cups

• Performance: Rock-solid fit for optimal crank alignment and pedaling efficiency

• Applications: Road, MTB

• Notes: PF30 sleeve included as needed; designed for seamless conversion without frame modification