Before this derailleur showed up, going wireless on a mountain bike meant paying XX1 or X01 money — GX Eagle AXS was SRAM's answer to that, bringing the same AXS wireless platform down to the mid-tier price point. This is the original hanger-mounted GX Eagle AXS derailleur, not the newer T-Type Transmission version, which matters if you're upgrading an existing 12-speed Eagle drivetrain and don't want to replace your frame or hanger to make it work.

Mechanically, this is the GX Eagle mechanical derailleur's platform with a wireless motor and battery pack bolted where the cable used to attach. It runs on SRAM's X-Actuation cable pull ratio and works with 10-50T, 10-52T, and 11-50T Eagle cassettes, and it's 1x only — no front derailleur compatibility. The Overload Clutch lets the derailleur body slide out of the way on a rock strike while keeping tension on the chain, which is the design detail that lets an electronic derailleur survive real trail hits instead of getting sheared off on the first log crossing.

Because AXS components all talk to each other, this derailleur pairs with any AXS controller in the SRAM ecosystem. eTap AXS road shift levers work with Eagle AXS derailleurs, so you can build a drop-bar bike with an Eagle drivetrain and shift it from road levers. That flexibility is a big part of why AXS caught on — one derailleur, multiple controller options depending on the build.... Read More