The SRAM XX1 Eagle AXS 12-speed rear derailleur is trail ready with AXS enabled componentry that makes personalization of the motor-driven derailleur possible. The AXS powered component enables customization and scales to an individual rider&';s liking via the SRAM AXS App 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 The derailleur is designed with a resilient Overload Clutch - in the event of an impact, the motor gearbox disengages, giving the derailleur freedom to move, and instantly returns back to its position for a seamless experience for the rider The system is tested to IP69K water and dust proofing standard for creek crossings, mud splattering and the resulting post-ride pressure washings Designed to work with X-Dome Eagle cassettes only Battery sold separately