If your ride doesn’t feel complete until you get a little dirt on your tires, you know the importance of capable components that can tackle anything. The Rival XPLR eTap AXS rear derailleur is a dedicated 1x-specific unit designed for use with the XPLR 10-44 cassette. It makes for an uncluttered drivetrain that takes on pavement and singletrack with equal aplomb. Wireless and proven eTap shift logic, AXS connectivity and advanced chain management mean this derailleur does exactly what you want when you need it.   Features Wireless electronic eTap shift logic for intuitive shifting, easy setup and reliability. 1x specific for use with 10-44 XPLR and 10-36 cassettes. SRAM AXS™ enabled, allowing easy personalization. Chain management keeps the drivetrain quiet and secure. Larger X-SYNC™ pulleys for increased durability and efficiency. Compatible with existing eTap® batteries. Battery NOT Included..   Specification Speed: 12s. Max tooth: 44. Pulley bearings material: Steel. Cage material: Aluminium.