[blucar]

Many years ago I had new tires put on an Olds I had. The car drove terrible, where-as it had always drive great. The tire dealer was not very helpful so I went to another store, the wheels and tires were removed from the car and put on a balancing machine, the tires were egg shaped. By the time the "truing" process was completed the tires were almost smooth on one side, with near full tread 180 degrees away.
Needless to say the tires were junk, never bought another set of Sears Allstate tires.