Sooner or later, the phone WILL ring again, and you will, once again, get to test the speed governor on the Expedition.. But the waiting must test the patience of even a fireman..Until then you can make practice runs over to the video store, check the tire pressure, top the fuel tank off, and keep this thread going FOREVER...
I have never seen a tire that has failed simply because of age..Now I have seem some old tires that have been allowed to go flat for a year or two and when someone attempted to pump them up, the cracked side-walls split open..So I guess you could call that an age-related failure..But you are right, passenger car tires with their one or two ply sidewalls are not going to last forever...You can almost stick your finger through them when they are new..
