Take the Eagle Transmission to the next level. Your entry into the AXS ecosystem, where the components are wirelessly connected. It is designed to make the transition from a mechanical to a wireless shifting system as easy as possible. Therefore, it includes an AXS-compatible derailleur body, an AXS battery, and an AXS Pod Controller. Simply remove the derailleur cage assembly and the mounting screw from your mechanical Eagle 90 or 70 derailleur and attach them to the new GX Eagle Transmission derailleur body from the upgrade kit. The included Eagle T-Type PowerLock is also included, so you can confidently reattach your existing chain.