Rotor BB1 Ceramic Road Bottom Bracket BSA black
The Rotor BB1 ceramic bottom bracket features nicely machined, alloy cups that help to provide a low 93 gram weight including the included sleeve. Enduro ABEC5/C3 ceramic bearings provide exceptional smoothness and durability. The Rotor BB1 bottom bracket cups are compatible with Rotor and Shimano-compatible external bearing road cranksets.
not compatible with Bontrager, FSA, SRAM, or Truvativ