Praxis Works Road Bike Bottom Bracket 68mm BB30/ PF30 Converter Shimano 24mm BB Praxis Works Road Bike Bottom Bracket 68mm BB30/ PF30 Converter Shimano 24mm BB

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

• New updated design with Rubber expanding collet.
• 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 older Specialized OSBB Road frames
• Not for BBRight, BB386EVO, BB30A, BB86, BB92 frames
• 68mm version cannot be used for MTB Cranks

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

• New updated design with Rubber expanding collet.
• 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 older Specialized OSBB Road frames
• Not for BBRight, BB386EVO, BB30A, BB86, BB92 frames
• 68mm version cannot be used for MTB Cranks