Description of praxis works Conversion Shimano BB30/PF30/OSBB 73mm MTB Bottom Bracket - PF46/BB42-73-24
Highquality BB30 and PF30 bottom bracket with 73 mm width for integrated 24 mm hollow axle.
Conversion BB - This industry leading conversion BB is a full proper bottom bracket for many BB housings. praxis works patent pending design keeps the cartridge bearings outboard of the frame right on 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, their trademark Praxis Collet system expands to a precise machined limit evenly dispersing pressure for a super tight fit.
With both cups connected and the collet set exactly to spec, there is no chance the bearings can come out of alignment or 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.
Fact Sheet of praxis works Conversion Shimano BB30/PF30/OSBB 73mm MTB Bottom Bracket - PF46/BB42-73-24