The SRAM Apex AXS XPLR Rear Derailleur is a key component to the adventurous riders setup. It fits a wide range of cassettes from 36T to 44T large cogs and manages chains flawlessly on or off the road. This is done with the help of its spring clutch which silently manages your chain. Thanks to AXS connectivity, you can easily manage your setup and firmware. Made for 1x systems, the Apex AXS XPLR Rear Derailleur is reliable, secure, and durable on any terrain.