I have this 94 Volvo Wagon with three hundred and something thousand miles on it that I like to drive out of town a lot... and I throw used tires on it, did for many years....
Every 3rd tire would bubble and give the car a wobble or pull to one side.
Needless to say you never know which direction they were originally spinning to put them on your car the same way so that they do not delaminate or separate Etc.... that n how LONG they've been sitting in the sun for how many years and if it's just Tire dressing that's filling in the cracks