What chainring size options do you offer for eTap AXS™? 50/37 (RED only), 48/35 , 46/33 1x = 36, 38, 40, 42, 44, 46 (ring+spider) 1x Aero 8 bolt direct mount = 48, 50 (RED only) Related articles Will additional chainring size options be added later? What cassette size ranges do you offer for RED and Force eTap AXS™? Why is my SRAM Force eTap AXS drivetrain noisy, especially the cassette? Can I add power to my Force eTap AXS™ crankset? Can SRAM RED, Force and Rival eTap AXS be fitted to a bike that is currently compatible with 8, 9, 10 or 11-speed groupsets?