Truck was shaking & irratating to drive. I jacked it up and could see the tire flat spots or out-of-round...so, I put a stand under one side of rear & a floor jack under the other side. Let it down until it touched concrete pad and started the burn out! 1" deep pile of rubber left smoldering after this trick.
Smoke covered the entire truck, but it is now round & smooth
Recommendation: Next time wear a respirator