Sorry did not want to get into the debate about tire life. Thanks for the links and information. Just a little more food for thought is that ~10years are so ago ABC (and I think also CBS) did articles on old tires being ticking time bombs. It was classic false news story reporting, with little study/facts. However, it has still got the the majority of the world thinking today that 7 years old is death.
I say again that there is now no established limit. Commercial casings can go many many years and with proper retread millions of miles. Yes tires need to be inspected but modern tires are not your grandfathers age trap. Keep them inspected and then let the INSPECTOR tell you the life span of your tire.
However, this age topic that I know gets many people going. Please, I don't really want to know, this is not the point of this thread here.
I do know that weight on the tire does cause flat spots and this can have very adverse affects on the tire life. Thus that's why I'm putting my jacks down. Again was just wondering about any worries with the air bags/jacks as I have most all the weight off the tires.
