SUMMARY:In June 2003@ NHTSA published a final rule establishing upgraded tire performance requirements for new tires for use on vehicles with a gross vehicle weight rating of 10@000 pounds or less. This document responds to petitions for reconsideration of that final rule. After carefully considering the petitions@ the agency is modifying certain performance requirements to better address snow tires and certain specialty tires. Specifically@ we are amending the performance requirements for snow tires used on light vehicles. Further@ we decided that the safety performance of certain other specialty tires is better addressed through the requirements of a different Federal safety standard.?