Are eTap® HRD 2x11 calipers compatible with SRAM’s other HRD levers? November 21, 2019 17:04 Updated No. They are only compatible with eTap® HRD 2x11 levers. Related articles Can I just buy the eTap® HRD 2x11 shifters and use them with my existing brake calipers? Does eTap® HRD 2x11 use the same hoses and fittings as other SRAM road disc brakes? What does HRD stand for? Will 11-speed SRAM RED eTap levers communicate with SRAM RED, Force or Rival eTap AXS electronic derailleurs? Are there rim brake and disc brake options? Comments 0 comments Article is closed for comments.