Shimano 105 11 speed groupsetlight action vivid shifting is just one of many features taken from shimanos top end groupsets making the 105 11 speed 5800 groupset a performance option for the masses the shifters and derailleurs incorporate shimanos 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 hollowtech ii chainse