Tire Rack 2006-9-7 2006-9-7 Ever wonder what the speed rating sybols on your tires mean? Speed ratings are designed to match the speed capability of tires with top speed cababilities of performance vehicles. Tire manufacturers do not recommend the use of their products in excess of legal speed limits. 72955 text/html 1.0 EN index,follow speed ratings tires performance vehicles tire tires Z-speed service description custom wheels goodyear eagle Speed Ratings text