Can I choose between 140mm and 160mm rotors for eTap® HRD 2x11 brakes? November 21, 2019 17:05 Updated Yes. We recommend 160mm rotors for road applications and 140mm for cyclocross. Related articles What size disc brake rotors does SRAM recommend for eTap AXS HRD? What type of brake pads are required for SRAM eTap AXS HRD road disc brakes? How do I know when to replace my rotors? What are the main differences between RED eTap AXS™ and Force eTap AXS™? Do the ETap® HRD 2x11 rotors come with titanium or steel hardware? Comments 0 comments Article is closed for comments.