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 it\'s state-of-the-art engineering. SRAM are popular on the time trial/triathlon 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. - T.H Key Features: The Power Lock connector link allows for tool-less attachment. Compatible with industry standard 10 speed systems. 114 links. Pin Treatment: Chrome-hardened pins. Size: 1/2 x 11/128 . Weight: 271g (Manufacturer claimed).