WASHINGTON -- General Motors won't follow Ford Motor Co. and DaimlerChrysler AG in recommending that car buyers change their tires after six years, regardless of tread wear or other factors.
"The fact is that most tires wear out before they age out," said James Gutting, director of GM's Tire and Wheel Laboratory in Milford, Mich.
GM said it requires its tire suppliers to meet more than 20 critical performance specifications, including passing an accelerated tire-aging test.
Gutting made the statement after Ford this spring put an advisory about tire age into its owners' manuals and onto its Web site.
"Tires degrade over time, even when they are not being used," the Ford advisory says. "It is recommended that tires generally be replaced after six years of normal service."