Fast, precise rear shifting is now more attainable than ever. Whether you ride 2x or 1x, tarmac or gravel, the Sram Force eTap AXS rear derailleur is up for the task. It features Orbit damper technology for quiet, secure chain management over rough roads and capitalizes on larger X-SYNC pulleys for improved durability and efficiency.   Features Orbit™ chain management technology keeps the drivetrain quiet and secure. Compatible with both 1x and 2x drivetrains. Sram AXS™ enabled, allowing easy personalization. 36t-max derailleur is compatible with 10-36 and 10-33 cassettes. 33t-max derailleur is compatible with 10-26, 10-28, and 10-33 cassettes. Larger X-SYNC™ pulleys for increased durability and efficiency. Compatible with existing eTap® batteries.   Specification Speed: 12. Cable pull ratio: n/a. Cage: Medium / Max Tooth 36T. Cage: Small / Max Tooth 33T. Pulley bearings material: Steel. Cage material: Aluminium. Battery NOT included.