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? 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? Is a special cassette tool required to install or remove SRAM RED and Force eTap AXS™ road cassettes? Comments 0 comments Article is closed for comments.