5 pieces (SRAM XX1 Eagle 12-Speed Trigger Shifter with Discrete Clamp, Black, XX1 Eagle Carbon DUB 148 DUB 170 or 175mm Direct Mount 34t X-Sync Crankset, Black, XG-1295 Eagle, 10-50 12 Speed Cassette, Black, PC-XX1 Eagle Hollow-Pin chain, Black, and XX1 Eagle 12-Speed Type 3 Rear Derailleur, Black). Needed Items: Bottom Bracket