The NX Eagle chain is designed with SRAM's Eagle geometry and features a solid pin construction. This results in a chain that offers smooth, efficient shifting that you can count on every time out., no matter the conditions.And it’s also the biggest contributor to the ultra-smooth, precise, durable and quiet performance found in the 10-50 tooth cassette and X-SYNC 2 chainrings. Installation is made easy with a dedicated 12-speed Eagle quick link, the all-new Eagle Power Lock. Using the new chain connector with FLOWLINK technology provides better chain-guiding and increased longevity. As a system, the unique features and design also provide significantly improved wear resistance on Eagle cassettes and rings