21 March 2014

Losses and Lessons: When it comes to tires, age is as important as mileage

VEHICLE COVERED: 1969 Chevrolet Corvette

WHAT WENT WRONG: On the surface, it makes sense that rarely used tires should last indefinitely as long as they’re properly cared for. But looks – and low miles – can be deceiving. The owner of a 1969 Corvette drove his car only occasionally on weekends, and he regularly cleaned and conditioned the tires. In the eight years that he’d owned the car he never felt the need to purchase new tires since they still looked great. An easy – and costly – mistake. One day while cruising down the highway, the rear driver’s side tire blew out.

DAMAGE/LOSS: Fortunately, the Corvette owner was able to keep the car under control and pull safely to the side of the road, but it suffered considerable damage. The blown tire shredded the left rear wheel well and quarter panel of the fiberglass-bodied ’Vette. Cost of repairs was $5,215, which Hagerty paid.

LESSON: There are no hard and fast “expiration dates” on tires, but because rubber begins to crack and deteriorate over time, most experts suggest that eight years is the maximum safe life expectancy of a tire. If you don’t drive your classic at all and it just sits on display, you can get away with keeping the original tires as they’ll hold air. But if you drive the car at all, you need to know how old the tires are. The U.S Department of Transportation (DOT) requires that all tires manufactured since 2000 have serial numbers, and those numbers easily identify their age. Using the last four digits, the first two numbers will reveal the week and last two the year. For example, a serial number ending in 4905 tells you the tires were made during the 49th week of 2005. If there are no recognizable serial numbers, you already have your answer – the tires were made prior to 2000 and need to be replaced.

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