Shimmy


#1

I had my tires rotated about a month and a half ago and since then my truck has had a vibration whenever I drive at speeds faster than 60mph. I have had the tires checked for defects and they are all good. My front wheels have had to be rebalanced everytime that I have taken the truck back to the tire store that rotates the tires. Is it safe to assume that I need new wheels?


#2

reverse them, back to front, front to back. see if it goes away.

it’s possible that the tires got worn when they were on the back. any abnormal tire wear?


#3

How were they checked for defects?

Have them spun on a Road Force Balance machine. That spins the wheel while pressing a drum against the tread to simulate road forces. It can detect suttle conditions and/or defects better than regular machines.