SRAM Eagle just got a little better now with extended range! If the 50t Eagle just isn't enough for you they've now added 2 teeth to the cassette! If you need a little extra help on the climbs but don't want to sacrifice your top speed by dropping the front ring size this is just what you need! Upgrading or setting up a 10-52 Eagle drivetrain? You definitely need one of these derailleurs meant for the large 520% range. The added range is just a little too much for the normal 10-50 derailluers. If you've got top of the line and already running AXS then you are already good to run 10-52, just don't forget to grab a new chain since you'll need a few more links. Your existing Eagle shifter is also good to go!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.Designed for a max 52t large cogBackwards compatible, works with 10-50t and 10-52t cassettesBackwards compatible with all SRAM 12 Speed shifters.Compatible with all SRAM 12 Speed chains. If using a 52t cassette, you will need a new chain. 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 separatelyItem SpecificationsCage LengthLongChain Wrap Capacity (teeth)42ColorLunarDrivetrain Speeds12Largest Cog52Rear Der/Shifter CompatibilitySRAM eTap AXSRear Derailleur Mount Type10x1 Standard