On any surface you can imagine, in any drivetrain configuration, the SRAM Rival eTap AXS Rear Derailleur can handle it. Secure chain management and fast, precise shifting make for a smooth and quiet ride, every time.-Wireless electronic eTap shift logic for intuitive shifting, easy setup and reliability-Compatible with both 1x and 2x drivetrains-36t cog max derailleur works with 10-28, 10-30, 10-33, and 10-36 cassettes-SRAM AXS enabled, allowing easy personalization-Chain management keeps the drivetrain quiet and secure-X-SYNC pulleys for increased durability and efficiency