Sram pc 1031 bicycle chain 10 speed the sram pc 1031 is a durable super narrow chain featuring powerlock connecting systems the pc 1031 is strong and promotes efficient power transfer and bearing the name sram you know its state of the art engineering sram are popular on the time trialtriathlon scene putting power and speed first the pc 1031 is no exception brilliantly crafted for endurance and speed this chain is a great component for your bike th key features the power l