Everything you need to bring wireless shifting to your existing Eagle drivetrain, the SRAM S500 Eagle AXS Upgrade Kit lets you experience the precision and customization of AXS without buying an entirely new groupset. At the core is the S500 AXS rear derailleur, delivering the wireless performance Eagle riders expect, paired with the AXS POD Controller for intuitive, customizable control on the fly. The kit includes everything needed to install, set up, and power your ride out of the box - whether you&';re upgrading an existing build or replacing worn components. Compatible with current Eagle drivetrains, it&';s the most straightforward path to wireless shifting. Key Features S500 AXS Rear Derailleur - Wireless connectivity for precise, cable-free shifting AXS POD Controller - Discrete clamp design provides customizable, ergonomic control Complete Upgrade Kit - Includes AXS Battery, USB-C Charger, Eagle Powerlock, and Chain Gap Tool