The inner cassette "lube ring" is recommended for use in ICON, Seraph, or Triton chassis in conjunction with the rear cassettes. This lube ring fits PRC smaller OD rear bearings. The purpose of this inner ring is to allow the fit and tolerance of the rear bearing within the rear bearing cassette to be more precise than ever before.
*White lithium grease is recommended to be used between the bearing race and lube ring to prolong the life of the ring*
