My rear tires look like cheap *** made tires, they slip on semi-wet roads like if somebody has the sprinklers on. They are firestones that I think came with the truck when it was new, my truck now has 33300 miles on it. I checked the tire pressure and they are at 30 which it says in the door sill. Last night I did some doughnuts in a parking lot, no white smoke, just that smell. I wake up and look at them, they look worse than before but still have the same tread left, I really want new tires but my dad wont let me untill they fail the penny head test, which they pass barely
so how bad did I mess up these tires and how long do you think they have left?