What Our Gearhead(R) Experts Are Saying:"I dropped this onto my existing Eagle setup before a weekend of shuttle laps, and shifting on the fly with the POD Controller felt completely natural after just a few runs. Skipping a full groupset swap saved me both time and money without giving up any performance."Upgrading your ride doesn't have to mean tearing it all down, and SRAM built the S500 Eagle AXS Upgrade Kit to prove it. Riders already running Eagle can go wireless in an afternoon, swapping in crisp, electronic shifting for a weekend of shuttle laps or a season of everyday trail riding without buying an entirely new drivetrain. The kit centers on the S500 AXS rear derailleur and the AXS POD Controller, letting you mount the shifter wherever it feels most natural on the bar. A battery, USB-C charger, chain gap tool, and Eagle Powerlock round out everything needed for a clean install, so the only thing left to do is ride.