The Praxis Works Shimano Hollowtech II bottom bracket converter is designed to be a proper bottom bracket BB for installing Shimano Hollowtech II cranks in either BB30, PF30, or Specialized’s OSBB road frames. High-grade Enduro 2437 bearings are fully sealed and are a fantastic replacement BB for your Shimano™ drivetrain. Our patent pending design keeps the cartridge bearings outboard of the frame right on Shimano spec for greater rigidity and free of frame/c-clip tolerance issues that other conversion bb systems deal with.
Simply press in the longer non-drive-cup, then the shorter drive cup threads into it. As the drive cup threads in, our trademark Collet system expands to a precise limit evenly dispersing pressure for a super tight fit. With both cups connected and our collet set exactly to spec, there is no chance the bearings can come out of alignment or wiggle/walk out of the frame. This bb converter design also uses a compressible o-ring on the non-drive side cup to compensate for frame shell width discrepancies.
Features
- For Shimano road cranks only.
- Patent Pending Outboard Bearing Design.
- “Collet” style non-drive cup expansion for wiggle-free press.
- Non-Drive O-Ring compensates for frame width discrepancies.
- Not for BBRight, 386EVO or Cannondale BB30A/PF30A frames.
- Frame shell cannot have any inner shell obstructions (like cable guides/screws) that prevent BB from installing.
- 68mm road version cannot be used for MTB Cranks.
- Use two standard BB tools that have 16 external notches and a 44mm ID, along with a press tool/drift for installation.
- Praxis Works warrants components to be free from defects in materials or workmanship for a period of 2 years after original purchase. However, there are limitations as “nothing lasts forever” so please read our







