High quality hybrid ceramic bearings with specially designed cups to allow for the smoothest and longest lasting bottom brackets BB86/92-24 Fits all 24mm spindles on a BB86/92 frame includes step-down 2-piece non-driveside reducer for use on GXP spindles. See included instructions for spacer reducer configurations alloy cups Choose Road for low friction designed for Road use, or MTB for weather resistant seals designed for MTB, Cyclocross, or Commuting use Choose Road for low friction designed for Road use, or MTB for weather resistant seals designed for MTB, Cyclocross, or Commuting use BB86-24 road alloy bottom bracket black BB86-30/BB92-30 fits Race Face Cinch, Rotor, 386EVO, Over Torque. Does NOT fit BB30 cranks 2yr warranty with annual bearing service. See KB-009x