High quality hybrid ceramic bearings and specially designed cups for the smoothest and longest lasting bottom brackets availableBB86/92 Fits SRAM DUB Cranks. This version includes the XC/Cross weather resistant seals designed for MTB, Cyclocross, or Commuting use. Road Seals are available if you would like to swap, but the friction loss from these is so minimal, the penalty to longevity benefit is not there