Consumer Reports tests how long your tires will last

LOS ANGELES (KABC) -- When you shop for tires, you may be swayed by the tread-wear claims. But like many people, Paul Niedermeyer finds his tires don't last that long.

"The tread-wear warranty would suggest they would last 80,000 miles and typically might just last 40 or 45," said Niedermeyer.

Consumer Reports tested the tread life of 47 tires - two samples of each. A convoy of trucks drove each tire 16,000 miles. The tread was measured at regular intervals to project how long the tires will last.

"Tire life does depend on the vehicle and proper maintenance. It also makes a difference how and where you drive. But our mileage projections are a good way to compare tread wear," said Mark Rechtin with Consumer Reports.

Some tire mileage claims proved overly optimistic, although their tread life is still quite good. Kumho's warranty is 75,000 miles. Consumer Reports projects 55,000. Continental says 90,000. Consumer Reports projects 60,000. Far worse is a Nokian. Its warranty is 80,000 miles, but Consumer Reports projects just 35,000. Tread-life testing some tires last much longer.

"Michelin was a standout. The three models we tested all met or exceeded their mileage warranty and came in with a projected tread life of 80,000 miles or more," said Rechtin.

The longest lasting tires in Consumer Reports' tests are the Pirelli P4 Four Seasons Plus. They claim 90,000 miles, and Consumer Reports estimates they'll go 100,000.

If your tires wear out before the mileage warranty, don't expect to get all your money back. You'll only get a credit for the miles that the tire didn't last. And it's only good toward the retail price or dealer's retail price for an identical or comparable tire from the same manufacturer. Because discounts below retail are common then your credit could be worthless.