Battery-less rear derailleur Sram Red AXS Max

The heart of the AXS ecosystem is lighter, more efficient and better performing than ever. Compatible with cassettes from 10-28D to 10-36D, this wireless jewel features enlarged rollers to reduce chain wrap and improve efficiency, plus an Orbit hydraulic damper to keep the system in place on rough terrain. A derailleur ready for 1x and 2x groupsets, on road and trail.