This asymmetric bottom bracket is found on 2022 and older Cannondale carbon frames. It fits M30 crank sets on a PF30A frame. M30 is a 30mm spindle with a stepdown to 28mm on the non-drive side, used by Praxis and InfoCrank. PF30A is an asymmetric bottom bracket found on Cannondale carbon frames: SuperSix Evo, SystemSix and Slice. Choose road bearings for road bikes, cross bearings for off road use or if you frequently ride on wet roads.