Are SRAM eTap AXS™ road chains more efficient than a typical 1/8” chain with smaller rollers? February 06, 2019 15:19 Across the board, new RED 12-speed chains have equal efficiency to 11-speed. Related articles How do I size a chain for a 1x SRAM eTap AXS drivetrain? How do I size a chain for a 2x SRAM eTap AXS drivetrain? How does the new SRAM RED chain lifespan compare to SRAM’s 11-speed SRAM RED chains? Will a new RED® road chain work on a SRAM Eagle™ drivetrain? What chain lubes do you recommend for new SRAM RED and Force road chains?