The shimano dura ace 9000 hg900 11 speed chain sets itself one step ahead of the competition focusing on delivering race worthy levels of performance over an extended period of time to ensure you39re never let down on that vital climb incorporating an outer plate design the shimano road chain drastically reduces the chance of chain suck complete with hollow pins to help save an extra bit of weight the inner plate of the shiamno dura ace 9000 11 speed chain has been developed to