I noticed when I am in a parking situation and have to cut the wheel hard to one side or the other, that the outer edge of my (255/60-18) standard tire just rubs on what appears to be a short body support that protrudes inside the wheel liner. Only mystery is it isn't supporting anything. It's held onto the chassis long sill with three bolts and doesn't seem to do anything but get into the way of the tire. Is it possible that it was intended to be some sort of temporary support for stacking the frames before assembly and just wasn't removed? Any clues?