At the core of the Red AXS ecosystem lies the Rear Derailleur that's lighter, more efficient, and more adept than its predecessors. Spanning cassette ranges from 10-28T to 10-36T, this wireless marvel boasts enlarged pulleys for heightened drivetrain efficiency and incorporates an Orbit fluid damper to maintain stability over rough terrain. Whether you're on the road or venturing off it, this versatile Red AXS rear derailleur seamlessly adapts to both 1x and 2x setups.