Praxis - Conversion BB for SRAM/GXP MTBPRAXIS CONVERSION BOTTOM BRACKET FOR SRAM GXP MTB THIS IS NOT AN ADAPTOR Our new patent pending elastomer collet 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 with orange elastomer threads into. As the drive cup threads in, the orange elastomer collet expands to a