Rear Derailleur XX1 Eagle AXSMore than a mechanical derailleur with a battery and a motor bolted on, the Eagle AXS derailleur is the brain of the whole AXS system. Trim it at set up for zero rub, making the near silent operation of Eagle even more stealth all while improving drivetrain longevity. It features a shorter cage for 10mm more ground clearance, with more chain wrap on the cassette to sit slightly further forward, and further inboard from mechanical Eagle. Instantaneous