The ultimate 9 speed chain, the Sram PC991 9 Speed Chain combines years of Sram expertise with modern day manufacturing to provide one of the smoothest & most durable chains available. Made using Nickel plating inside & out the Sram PC991 9 Speed Chain provides smoother, accurate & faster shifts in any conditions while Power Chain II technology enhances performance when merged with Truvativ chainrings to unmatched levels. Power Chain II Precise shifting at its finest, Srams Power Chain II technology increases front & loaded shifting performance without affecting rear end precision. In addition a Step 2 riveting process increseases the Push Pin Power for increased strength & durability.