Praxis Conversion Bottom Bracket – BB30/PF30 to Shimano (MTB)

Designed to be a proper BB for installing Shimano™ Hollowtech II steel spindle cranks in either BB30, PF30, or Specialized’s OSBB frames. The Praxis 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 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, Praxis’ 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 design also uses a compressible o-ring on the non-drive side cup to compensate for frame shell width discrepancies.

SPECIFICATIONS:

• • This version is for Shimano™ Hollowtech II steel spindle cranks only.

• • Designed precisely to Shimano bearing stance and chain line spec.

• • Forged and machined heat-treated 7075 T6 Aluminum

• • For 73mm BB30 or PF30 mountain frames OR 66mm BB30 or PF30 road frames.

• • Not for BBRight, BB386EVO, BB86, BB92 frames!

• • Steel version: Enduro 2437