Sram pc1051 10 speed chaina chain is only as strong as its weakest link sram took this to heart when they designed the innovative new 10 speed powerchain featuring the powerlock connecting link featurescompatibility extends to industry standard 10 speed systems compatible gears 10 model pc 1051 closing link powerlock outer plate nickel silver inner plate grey pin treatment chrome hardened pins weight 277g 114 links recommended group sram red sram force sram rival shimano comp