11 speed drivetrains demand tighter tolerances than their predecessors, and chain quality determines how smoothly power transfers through the system. SRAM's PC-1191R represents the top tier of their 11-speed chain lineup, using hollow pin construction and chrome-hardened surfaces to reduce weight while maintaining durability under racing loads. The "R" designation indicates this is the road-specific version, optimized for the closer gear spacing found in road cassettes.

The hollow pin design removes material from each link's connection point, dropping weight without compromising the pin's structural integrity where it matters. Chrome hardening on the outer plates resists wear from front derailleur cage contact during cross-chain gear combinations. Inner plate chamfering helps the chain climb onto larger cogs and chainrings with less resistance, which translates to crisper shifts when you're accelerating out of corners or responding to attacks.

PowerLock connects the chain without tools. Unlike reusable master links, PowerLock is a single-use connector that SRAM recommends replacing each time you remove the chain for cleaning or service. The chain ships with one PowerLock included. If you're the type to pull your chain regularly for deep cleaning or waxing, stock up on replacement PowerLocks.... Read More