Originally Posted by Mike V.
I recently put new rims and tires on my 03 mustang. Right after that I noticed that around 50 mph the steering wheel starts to jerk back and forth about an inch. Any idea how to get rid of this annoying issue?
1. Under inflated tires
2. Unbalanced tires
3. Incorrect tightening of lug nuts (star pattern)
4. Bad wheel to rim size ratio
5. Wheel spacers not correctly installed (if applies)
I just had the same issue and checking all if these solved my problem. I went from 15, to 18's staggered. Also try unhooking your battery for 15 minutes to reset the computer. I heard it helps the car calibrate to the new tire size and circumference.