- High quality hybrid ceramic bearings with specially designed cups to allow for the smoothest and longest lasting bottom brackets - PF30: Fits any BB30 crank on a PF30 frame (alloy cups) - PF30-24 GXP: Fits all 24mm spindles on a PF30 frame and includes step-down 2-piece no -driveside reducer for use on GXP spindles. See included instructions for spacer and reducer configurations (alloy cups) - PF30-386EVO: fits any 386EVO, Rotor 30mm, or RaceFace Cinch crank on a PF30 frame (alloy cups) - PF30A fits Cannondale 2015 Slice and FSi and 2016 SuperSix EVO - Choose (Road) for low friction designed for Road use, or (MTB) for weather resistant seals designed for MTB, Cyclocross, or Commuting use - 2 year warranty with annual bearing service. See KB-009x