Key Features:AXS™ enabled for easy monitoring and firmware upgrades,Single-ring drivetrain simplifies functionality,Fully integrated power meter into a direct mount aero chainring,Power readings are accurate within +/-1.5% and aren’t affected by climate conditions during a ride,Power balance measures left and right legs separately,SRAM X-SYNC™ wide-tooth, narrow-tooth chainring technology provides maximum chain control,Laser-etched chainring finish is more durable,8-bolt direct mount compatibility only to new RED® and Force eTap AXS™ cranks..