..Do tires need a use-by date, like the milk in your refrigerator? The National Highway Traffic Safety Administration is being asked to require tire makers to provide expiration dates. Strategic Safety LLC, a safety research firm, submitted comments to NHTSA in September 2003, saying it has identified 20 cases in which tires six or more years old failed, resulting in nine deaths.
NHTSA expects to complete a two-year study in March that will gauge how tires actually age, whether lab tests can mimic aging, and whether a tire-endurance and aging test can be developed. The study may show whether a use-by date is feasible, says a NHTSA spokesman...
The bottom line. We believe that most consumers will wear out tires before age becomes an issue.