alright i was helping my nephew out today behind my car. looked over at my car and noticed that my passenger side rear tire looked funny. went over to check it out, ran my hand over the tire and it is cupping horribly! it has HUGE waves in it! wtf? took it down and had the car looked at. diagnosis is a bent rim. i knew is was bent, it was when i got the car. didnt even think that was the problem! duh! anyway, it is time for new rims and tires!
Or just replace the bad rim. You can get them cheap as chris said. Check the FS board on the forsale board.
