The SRAM X01 Eagle AXS 12-speed rear derailleur is specifically designed and optimized to be motor-driven instead of cable-actuated to operate with other Eagle AXS components. 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 Battery sold separately Designed for a max 52t large cog