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In response to our findings, Sears released a statement saying, "It is unusual that there would be tires that old in our stores. We follow an inventory process of first in, first out, and we turn our tire inventory an average of more than three times a year. We note that there is a difference of opinion in the tire industry (the Tire Industry Association, RMA and the major tire manufacturers) about the service-life limits of tires. The safety of our customers is a top priority for Sears, and we'll continue to work with all interested parties to push for a consensus on tire service limits. Consistent maintenance, proper inflation and regular inspection for tread wear patterns and damage are the keys to good tire performance. For consumers who are concerned about the age or condition of their tires, it is recommended they let us evaluate their tires regularly, which we'll do free of charge."
Goodyear, Wal-Mart and the U.S. tire industry trade association also say that age is not the key factor in tire safety, and that consumers should pay attention to other maintenance issues. According to Goodyear spokesman Jim Davis, "We don't support age-based limits on tires because there's no scientific data to support that." Wal-Mart spokesperson Linda Blakley said, "Should the NHTSA (National Highway Traffic and Safety Administration) create a ruling related to age of tires and its effect on the safety of our customers, we would of course comply."
Some of the biggest tire manufacturers, including Bridgestone/Firestone and Michelin, however, have issued bulletins to retailers calling for tires to be removed from service 10 years after the date of manufacture. The bulletins note that consumers should follow the tire replacement recommendations in their vehicle owner's manual if they offer different advice on a tire's shelf life. Ford, Chrysler, BMW, Audi and Toyota all recommend that tires be replaced six years after they were made.
Because of those bulletins, tire retailers should not be selling tires close to or older than 10 years of age, according to Sean Kane, who heads a private auto safety firm. "It's shocking to hear that particularly now because companies, like Sears, these large tire retailers have had this information in their hands for some time," said Kane.