[twobjshelbys]

The tires on my truck are about 15 years old. They refuse to wear down. I have no intent on replacing them because they are "old". There is no sign of any aging in the sidewalls. And this is including almost 8 years in the Nevada desert heat.

On the other hand the tires on my daughter's car got heat rot after 3 years down here (total, maybe 7 years old). Sidewall checking, etc.

On my Ford GT the tires were original Goodyears and 5 years old when I got them. I knew spirited driving and at least one trip to the track were in the lineup, so I changed them before I took delivery of the car.

For your case, it depends on what you plan on doing with the car. If you're just driving it in town and don't get wild, they'll be OK. Oh, that's provided they're modern steel belted radials. If you've got bias ply tires change them before you drive it anywhere.