Shimano ultegra drivetrain light action vivid shifting is just one of many features taken from shimanorsquos top end groupsets making the ultegra 11 speed 6800 groupset a performance option for the masses the shifters and derailleurs incorporate shimanorsquos vivid shift technology with a light but positive feel all the way through the 11 speed drivetrain giving you the gear you want when you want it with the minimum of effort with its two piece hollow axle design the shimano hollowt