The SRAM PC-1091 chain takes the fantastic performance of the 1090 to the next level. SRAM reshaped the outer links to lower running noise and increase overall durability. The 1091's lower and complex shaped shoulders flow better and handle hard gear changes better than ever. The 1091 is identical to the 1090R except it does not have cut out side plates and weighs a few grams more as a result.
Nickel coated inner and outer plates reduce friction and allow easier clean up. The plates are connected with chrome-hardened hollow pins for high strength and low weight. It is also Shimano 10-speed compatible and works with all SRAM 10-speed groups. The PowerLock connecting link allows tool-free installation. Just attach the PowerLock to the chain and snap it into place by adding a bit of tension to the drivetrain.