The newest sram pc1091r chain features more heavily chamfered outer plates for improved shifting and quieter running other advancements include a new inner plate finish plus chrome hardened pin construction both for longer chain life the hollowpin construction of sram39s 10 speed powerchain provides smooth precise shifting and weight savings without sacrificing strength powerlock connecting link for easy tool free installation 10 speed compatible wt 255g 114 links features weight 2