What is the max cog size that is compatible with Eagle AXS™ rear derailleurs? February 06, 2019 16:07 50T. Eagle AXS™ derailleurs are designed to be used only with Eagle™ 10-50T cassettes. Related articles What type of clutch mechanism does the Eagle AXS™ derailleur use? Is it the same as the new SRAM RED eTap AXS™ derailleur? Why doesn’t Eagle™ use the new Orbit fluid clutch instead of the roller bearing clutch? Can I use other SRAM 1x11 shifters with 12-speed Eagle™? Are 11-speed SRAM RED eTap™ derailleur batteries compatible with Eagle AXS™ and SRAM RED eTap AXS™ derailleurs? What cassette size ranges do you offer for Eagle AXS™?