SRAM S500 Eagle AXS Upgrade Kit Go wireless without the fuss. The SRAM S500 Eagle AXS Upgrade Kit is everything you need to bring wireless electronic shifting to your existing Eagle drivetrain, without buying a full groupset. Built around the S500 Eagle AXS rear derailleur, the kit adds AXS wireless control and the customizable AXS Pod Controller to any compatible Eagle build. A Type 3 cage damper keeps the chain quiet and controlled on the descent, and AXS connectivity makes setup, personalization, and component integration straightforward. Compatible with Eagle 50t and 52t cassettes. Battery and charger included. Features S500 Eagle AXS rear derailleur with Type 3 cage damper delivers confident chain retention and quiet, controlled descending performance AXS wireless connectivity enables easy setup, personalization, and seamless compatibility across SRAM MTB and Road AXS components AXS Pod Controller with discrete clamp features a click-and-fire two-button design with an intuitive action, ergonomically adjustable buttons, and full button assignment customization through the AXS App Eagle cassette compatible works with Eagle 50t and 52t cassettes sold separately Battery and USB-C charger included so the kit is ready to install and ride right out of the box Chain Gap Tool included for precise derailleur setup and tuning during installation SPECIFICATIONSRear Derailleur SRAM S500 Eagle AXSDrivetrain Speeds12-speed Shifter Compatibility SRAM e Tap AXSCassette Compatibility Eagle 50t, Eagle 52t (cassette sold separately)Chainrings/Crankset Not included Cassette Included No Rotor Included No Battery Included Yes Charger Included Yes (USB-C, cord not included)Kit Contents S500 Eagle AXS Rear Derailleur with protector, AXS Battery, AXS Pod Controller with discrete clamp, Eagle Power Lock chain connector, USB-C Charger, Chain Gap Tool | Sram | S500 Eagle Axs Upgrade Kit Kit (Battery And Charger Included)