Quote:
Originally Posted by retiredguy123
Whenever I buy new tires or a new or used car, I always check the Tire Identification Number (TIN), which is stamped on the sidewall of all tires sold in the U.S. It starts with DOT and ends with a 4 digit number. The 4 digits indicate the week and year when the tire was manufactured. So, "1219" would indicate that the tire was made in the 12th week of 2019. Tires can start to wear out after about 6 years, even if they have a lot of tread remaining. I think it is a good idea to not assume that your new tires are actually new, even if they are on a new car. Car dealers can actually switch tires on a new car without affecting the car warranty because the tires are covered by a separate tire warranty.
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I have yet to wear out set of tires since I was 21. I replace them every 5 years. After that dry rot cracking/deterioration risks blowout or continue slow leakage.