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How Treadwear Impacts Your Tires

If you have started researching new tires, or recently purchased a set, you would have noticed the treadwear grade that is now found on most tires.  The treadwear rating or grade is simply a comparative tool that you can use to compare different models and styles of tires.  You will not be able to determine the mileage that a tire is good for, and to make things a bit more challenging, each manufacturer will use a different method in their claims of mileage, making it even more difficult to compare different brands of tires.

high performance car tire

One of the best guides that we have found on comparing tires is through Consumer Reports.  The guide brakes down the expected mileage of most of the all-season and the performance tires.  Each tire is tested using machinery that creates some rigorous treadwear and also puts exactly 1,000 miles a day on the tires.   The truck tires and car tires are tested for a matter of weeks and a total of 16,000 miles are put on each set.  The higher performance tires will be run through the same tests, but are only subjected to 12,000 miles.

A few of the interesting results were the impact had on the tires for misalignment, under-inflation as well as over inflation, and the wear on a properly maintained and aligned vehicle.  There is an obvious difference in wear on tires due to the inflation.  Having your tires over-inflated to 40 psi compared to the recommended 35 as an example, will cause the center of the tires to wear quicker and decrease the life of the tires.  Under-inflating the tires to a number of 30 will cause the outside of the tires or what is referred to as the “shoulder” to wear out quicker.

Misalignment And Tire Rotation

There is a reason that the mechanic suggests rotating your tires and checking the alignment after a certain amount of mileage.  If your vehicle is out of alignment, you will notice faster wear on what side of the tire. If you rotate your tires frequently, the wear will even out over time creating a longer last tire.  Higher performance tires also respond higher to misalignment as well since they are engineered and designed for a shorter life spam.

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