Praxis Conversion ConvBB (Shimano) OSBB

Patent Pending Design
“Collet” style non-drive cup expansion for wiggle-free press
Non-Drive O-Ring compensates for frame width discrepancies


In stock

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Colour or size is subject to availability
SKU: A10000722 Category: Brand:

This version for Shimano™ Hollowtech II steel spindle road cranks only.
Designed precisely to Shimano bearing stance & chain line spec.

Forged & machined heat-treated 7075 T6 Aluminum
For 68MM BB30, PF30, and Specialized Road frames
Not for BBRight,BB386EVO, BB86, BB92 frames
Steel version: Enduro 2437
Ceramic Version: Enduro 2437 Angular contact, Grade5 Ceramic balls, ABEC5 Assembly
68mm version cannot be used for MTB Cranks

Length: 68mm
ConvBB OSBB Shimano
Bearing: Non-Ceramic, Ceramic

For specialized road bike only


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In the past he had been an integral part of many of the most well known R&D teams in the industry – Member of the original Bontrager Cycles, Sr. Design engineer at Specialized, Director of Engineering at Santa Cruz Bicycles, and many other individual R&D ventures for well known industry projects.

It was simply time to branch out and focus on something that he had been working on for years: Drivetrain Components.