Praxis Works Shimano Conversion Bottom Bracket BB30/PF30

68mm for Shimano Road Cranks
73mm for Shimano MTB Cranks

Ok...so you have BB30, PF30* or a Specialized OSBB frame, but you need to run a Shimano crank?

No worries. Our Praxis Works Conversion Bottom Bracket is just what you're looking for. Made to fit in either BB30 or PF30 frame, the conversion BB is designed to be rock solid for a Shimano** Hollowtech II crank to be installed in your frame.

Features

“How do I know the conversion bottom bracket drive cup on the BB30 and PF30 is installed completely?”

ANSWER/INSTALL TIP

As you’re threading down the Drive cup and the collet system starts to expand, grab a 2nd BB tool to hold the Non-Drive Cup steady.

This gets you more leverage when threading down the Drive Cup and also gives you a tactile feel of when the Drive Cup has fully bottomed out on it’s machined ‘stop.’

The machined ‘stop’ sets the Drive Cup bearing precisely on Shimano spec, and also sets the collet expansion.

Note- The machined stop prevents the collet from over expanding past exact spec

Specification

• Praxis Works Bottom Bracket Converters are available for both 68 and 73mm shell sizes.
• The converster works with eiher BB30 or PF30.
• To fit the converter to a BB30 frame, please remove the plastic sleeve (tube).
• To fit the converter to a PF30 frame, please fir the converter with the plastic sleeve.

**Designed for Shimano™ 24mm Hollowtech II cranks.

Specific Frame Notes