The shimano ultegra 6800 disc groupset is a super slick groupset and comes with everything you need to upgrade your old 6700 ultegra or 105 components it comes with 6800 chainset rs685 sti shifter levers a hollowtech ii bottom bracket front and rear disc callipers rotors not included braze on front and medium cage rear mech and 11 speed cassette and chain please note that the 11 speed cassette does not fit on shimano 10 speed freehub bodies