Last year I bought my dad's 2001 Tundra it now has 17,000 miles with the original tires. Last week during the state inspection they told me I needed to replace the tires due to their age. When I asked to see the regs they could not find anything in writing in the Va regs, so it went from a requirement to a recomendation. The guy started saying due to ozone damage the sidewall could blow out. There is no visoble cracking, I can't see replacing them with good tread. I don't do any heavy hauling and all I tow is a 14' jon boat total weight with trailer is less than 800lbs. Since I'm getting ready to write a check to buy the Uncle Sam a set for one of his Humves, I don't want to replace them till the end of the summer, what do you think?