Also, I checked out the tire-cupping thing. When I got it home and pulled it into the garage I looked at the tire. There's a flat spot on the left side of the arc, all the way around. As soon as I saw it I knew what it was from. It's from where I position myself on the interstate. I'm always just to the left of the center of the lane so that flat spot is from me riding on the side of the raised part of the road where the car's tires ride. It looks as if I rode in a circle for a few hundred miles, LOL! Definitely needs replaced.