Shimano ultegra 6800 11 speed groupsetshimanos ultegra 6800 series is pro proven enjoying the benefits of trickle down technology from its bigger brother dura ace the ultegra 6800 11 speed groupset is infused with state of the art technology and is redesigned from top to bottom superbly stiff light and responsive this ultegra 6800 11 speed groupset is a major upgrade on any racing or training road bike fc 6800 cranksetfeaturing a unique four arm spider and hollowtech ii construction to