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 red 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. - wireless electronic etap shift logic for intuitive shifting easy setup and reliability - 1x specific for use with 10-44t xplr and 10-36t 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 sold separately item no. 406100379