The PowerChain 1071 10 Speed Chain has no weakest link. SRAM’s new super narrow 10-speed Power Chain features the Powerlock connecting link – the only secure tooless attachment for a sub 6mm chain in today market. SRAM PC 1071 R series chains also feature hollow pin construction for weight savings with no sacrifice of strength. Lightweight, smooth, precise-shifting. A true high-performance product. Compatibility extends to industry standard 10-speed systems.