13-speed, Full-Mount attachment method Carbon cage, Magic Wheel (Bottom derailleur pulley keeps spinning if an object gets jammed), suitable for 1x drivetrains, without battery Only suitable for frames with UDH specification (derailleur hanger-free interface). Item Type Application Gravel Functionality electronic Groupset Red XPLR eTap AXS Main Color silver Mounting Full-Mount System Compatibility 13-speed max. Sprocket size 46 T. The SRAM RED AXS rear derailleur is specifically designed for use with the SRAM 10-46T XPLR 13-speed cassette and Flattop chain. The Universal Hangerless Interface (UDH) suspension and Full Mount attachment ensure the most precise shifting and ultimate resistance to shocks. 1x specific for use with 10-46T XPLR 13-speed cassette and Flattop chain Universal Hangerless Interface (UDH) and Full Mount attachment ensure the most precise shifting and ultimate resistance to shocks Requires frame with UDH interface Simple adjustment without adjustment screws Superior chain management Superior chain management Replaceable and overhaulable parts Magic Wheel keeps the chain moving even if dirt gets into the bottom pulley Compatible with existing AXS batteries SRAM Article number: 735706 EAN code: 710845899829 Supplier number: 00.7518.185.000 Retail packaging: Yes