
The newest SRAM PC1091R 10 speed Power Chain features more heavily chamfered outer plates for enhanced shifting & quieter running. Other advancements include a new inner plate finish plus chrome hardened pin construction, both for longer chain life. The Hollow Pin construction of SRAM's 10 speed Power Chain provides smooth, precise shifting & weight savings without sacrificing strength. Power Lock: SRAM chain engineers developed Power Lock as a tool free, sure & consistent way to connect our 10 speed chains. While PL does not require special tools for install, the especially tight tolerances of 10 Speed drive trains mandated that each Power Lock is good for a one-time application only. Hollow Pin: SRAM employ Hollow Pin construction on all SRAM top of the line Power Chains. HP yields plate retention strength, front & rear shifting efficiency, & low weight benchmarks unreachable in solid pin chain applications.