SRAM Red XPLR eTap AXS is the best way to shift through your next gravel and cyclocross adventures. It offers the best performance for SRAMs world renowned 12-speed electronic technology. This rear derailleur is the driving force behind proper chain management and smooth gear shifts. Compatible with 1x groupsets, this derailleur includes SRAMs X-Sync pulleys which increase the durability and efficiency of the drivetrain. It can be used with 10-44T and 10-36T XPLR cassettes and flattop chains but is not compatible with Eagle chains. Equipped with SRAM AXS personalization, you can customize every function of your groupset thanks to your derailleurs interaction with the SRAM AXS App. The SRAM Red XPLR eTap AXS Rear Derailleur is your key to silent and efficient chain operation.