How do I size a chain for a 1x SRAM eTap AXS drivetrain? May 23, 2019 19:02 Updated Big chainring and big cog + two inner and two outer links. Related articles How do I size a chain for a 1x SRAM Eagle AXS™ drivetrain? How do I size a chain for a 2x SRAM eTap AXS drivetrain? Are SRAM RED and Force eTap AXS PowerLocks different from SRAM Eagle 12-speed PowerLocks? What chain lubes do you recommend for new SRAM RED and Force road chains? Are special chain tools, chain pliers, or chain whips required to work on SRAM RED eTap AXS™ drivetrains?