The shimano ultegra series is pro proven as it is a direct trickle down from our dura ace group it stands for state of the art technology proven in pro races the technology used in the new ultegra 6800 series with 11 speed newly designed brakes new chain treatment etc groupset includes crankset fc 6800 standard 3450 please select version bottom bracket sm bbr60 bsa sti set st 6870 rear derailleur rd 6870 ss front derailleur fd 6870 braze on brake set br 6800 cassette cs 680