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 AppIt features a shorter cage for 10mm more ground clearance with more chain wrap on the cassette to sit slightly further forward and further inboardThe 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 riderThe system is tested to IP69K water and dust proofing standard for creek crossings mud splattering and the resulting post-ride pressure washingsBattery sold separately