Summary: Cooper Tire & Rubber Company (Cooper Tire) has determined that certain Cooper Discoverer AT3 tubeless radial light truck tires do not fully comply with Federal Motor Vehicle Safety Standard (FMVSS) No. 139, New Pneumatic Radial Tires for Light Vehicles. Cooper Tire filed a noncompliance report dated July 6, 2020. Cooper subsequently petitioned NHTSA on July 31, 2020, and supplemented its petition on May 28, 2021, for a decision that the subject noncompliance is inconsequential as it relates to motor vehicle safety. This notice announces receipt of Cooper Tire's petition.