The praxis 68mm sram gxp bottom bracket converter designed to be a proper bottom bracket bb for installing sram gxpisis2 cranks in either bb30 pf30 or specializedrsquos osbb road frames our patent pending design keeps the cartridge bearings outboard of the frame right on sram spec for greater rigidity and free of framec clip tolerance issues that other systems deal with praxis 68mm sram gxp bottom bracket converter features for sram gxpisis2 cranks also for oval concep