There is a possibility it could be the wheels, but not in the way one might think. Sometimes the lug holes won't be concentric with the wheel. That can cause the problem, especially if you've changed the wheels to a non-oe wheel. There's 2 different types of centering on wheels, lug centric and hub centric. many older wheels are lug centric, meaning that the wheel is cetered to the hub by the wheel studs. That style is not very accurate. Most, if not all, newer vehicle use a hub centric, or hub piloted if you will, style wheel, using a center hole andhub pilot that are machined to center and fitment. I know that if you change wheels on cars designed for hub centric wheels to lug centric or do not use a hub centering ring, they tend to have the very problem decribed.
