SRAM Force eTap AXS Rear Derailleur - 12-Speed, Medium Cage, 36t Max, Gray, D1The 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