What surface treatment/coating is SRAM using on new Eagle AXS™ chains? February 06, 2019 16:09 Updated The RAINBOW chain and cassette finish is PVD Titanium Nitride. Related articles How does the new Eagle AXS™ chain lifespan compare to SRAM’s current XX1 Eagle™ chain? What chain lubes do you recommend for new AXS™ chains? Can a SRAM Eagle AXS™ PowerLock® be installed and uninstalled repeatedly, or does it need to be replaced with a new PowerLock® after being removed one time? How do I size a chain for a 1x SRAM Eagle AXS™ drivetrain? Will a new SRAM RED AXS™ road chain work on a SRAM Eagle™ drivetrain?