Praxis M30 Press Fit bottom brackets are designed to be a proper
bottom bracket (BB) for installing Turn M30 spindle based cranks in
either;
• BB30,
• PF30,
• BB86,
• BB92
• 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.