The PC RED22 is SRAM's flagship road chain, designed for the 'True 22' drivetrain. The True 22 designation means that SRAM intends for their eleven speed Red system to work in all 22 gearing configurations. Meaning that worrying about cross chain situations is a thing of the past. If you're powering over a small rise in a fast-paced race and bump up to your 53X25T gear, this is not only an option but it is recommended when compared to shifting the front ring.
Completely redesigned from the older PC 1091 the PC RED22 has new features that help with the lifespan, shift quality and lateral flexibility required of True 22. The plates are now more heavily chamfered on the outer interface with the pin, and the inner surface receives a new finish to help reduce friction. The hollow pins are also treated with a chrome finish to complement the finish on the inner plates.
The PC RED22 chain uses an eleven speed version of SRAM's PowerLock silver connecting link, and therefore doesn't require any tools to install once the chain is the correct length. If you need to remove the chain for cleaning or maintenance a new PowerLock connector is needed.