How do I know when to replace my eTap® HRD 2x11 brake pads? November 21, 2019 17:36 Updated When brake pad material and backing plate combined measures 3.0mm thick or less they need to be replaced. Related articles How do I know when to replace my rotors? What type of brake pads are required for SRAM eTap AXS HRD road disc brakes? What is the bed-in procedure (brake preparation)? Why is my SRAM Force eTap AXS drivetrain noisy, especially the cassette? What tubeless tires are compatible with Zipp’s hookless rims? Comments 0 comments Article is closed for comments.