Praxis works osbb to shimano bottom bracket converter black
This is the praxis works osbb to shimano bottom bracket converter praxis conversion bottom bracket is designed to be a proper bottom bracket for shimano hollowtech cranks in a specialized osbb frame comes complete with sleeves for carbon sbc frames their patent pending design maintains the cartridge bearing outboard of the frame right on shimano spec for greater rigidity and free of frame clip tolerance issues that other systems deal with simply press in the longer non drive cup then the