This high quality kit allows you to convert your 1 piece bottom bracket (BB) to the standard 3 piece. Comes with the Alloy adapters and full set of bearings and races.
IF you do have (or are buying) a full cartridge bottom bracket - a full cartridge bottom bracket is included with the HD Shifter kits - you ONLY need the Bottom Bracket Adapters [SBP-BBAD002] for $13.95, not this conversion kit.