Will the eTap AXS groupset function without a front derailleur? SRAM USA May 23, 2019 20:21 Updated Yes. SRAM RED and Force eTap AXS is designed to be used in both 1x and 2x drivetrain configurations. Related articles What is the max rear tire width compatibility for SRAM RED or Force eTap AXS front derailleurs? Are 11-speed SRAM RED eTap derailleur batteries compatible with SRAM RED and Force eTap AXS derailleurs? Can I use the eTap AXS rear derailleur without the front derailleur to make a 1x drivetrain? Is there a different eTap AXS rear derailleur for 2x and 1x drivetrains? What size disc brake rotors does SRAM recommend for eTap AXS HRD? Comments 0 comments Article is closed for comments.