The Eagle technology has revolutionized mountain biking. Designed as a specific 1x drivetrain, it is lightweight, robust, intuitive to use, and has the right gear range for any terrain. The Nx Eagle drivetrain is the latest addition to the Eagle 1x ecosystem, and because it shares the same technologies with the XX1, X01, and GX Eagle groups, it is 100 percent compatible within the Eagle ecosystem. With Nx Eagle, entering the Eagle ecosystem has never been easier, allowing even more riders to experience the gear range and performance of Eagle. Size: DM 3mm Offset Boost.