The SRAM Force eTap AXS rear derailleur is designed for both 1x and 2x systems. It capitalizes on X-Range™ gearing technology for enhanced range and chain management, and features larger pulleys for improved durability and efficiency. -Orbit chain management technology keeps the drivetrain quiet and secure -SRAM AXS enabled, allowing easy personalization -Larger X-SYNC pulleys offer increased durability and efficiency -A single rear derailleur for all gearing combinations, including 1x and 2x -Battery sold separately -Compatible with 10-36 and 10-33 cassettes