The heart of the connected cadre. The SRAM RED eTap AXS rear derailleur is AXS enabled for easy personalisation and designed for both 1x and 2x systems. The derailleur also comes with faster pulleys, bearings, improving speed in every way. Orbit chain management technology keeps the drivetrain quiet and secure. Compatible with both 1x and 2x drivetrains. The 36t-max derailleur is compatible with 10-36, 10-33, and 10-28 cassettes. The 33t-max derailleur is compatible with 10-26, 10-28, and 10-33 cassettes. Improved motor and signal travel for faster shifting. Large X-SYNC pulleys and ceramic bearings for increased durability and efficiency. Compatible with existing eTap batteries.