If you are looking to maximize the efficiency of your Cinch compatible Race Face crank an Absolute Black Oval Chainring is the way to go. Absolute Black's patent-pending ovalized chainring design optimizes the "power zone" in your pedal stroke giving you the effect of a larger chainring where you want it and a smaller chainring when you don''t in the weaker part of the stroke.
Absolute Black Oval Cinch BOOST Chainrings are compatible with 9/10/11-speed and 12-speed Eagle drivetrains and compatible chains. Cinch BOOST Oval Chainrings have a 3mm offset and are designed to be used with 148mm BOOST spaced rear hubs. Absolute Black also recommends the BOOST Oval Chainring for Race Face fat bike cranks to help dial in the chainline.
At their widest point, Absolute Black Oval Chainrings chainrings have the same diameter as a chainring 2t larger than their tooth count. If your frame has chainring clearance limitations you will need to select a chainring a size smaller than listed to avoid possible damage to the frame and chainring.