[jhv48]

Had the same problem. Couldn't get the damn vibration to disappear from 60-70 MPH. Had Hunter and Roadforce balance, rotated the tire on the wheel. No dice.

Solution (even though the left front wheel was slightly out of round) find an old school tire guy that uses a 40 year old balancing machine that balances the entire rotating assembly while on the car. Off the car won't do it. The guy will jack up the front and spin one wheel up to 80 MPH and then let it gradually slow down. He will put his hand on the front fender or watch the rear view mirror to see if it vibrates at all while the tire slows down. He will then add and move weights around until there is no vibration to the fender/mirror at any speed.

It works, but the younger guys in most shops will have never heard of this method. Hot rod shops will know someone. I paid $25 per wheel.

These artists are few and far between. Luckily I have a guy that specializes in this method. Call around, somebody will know a shop that still practices this method.

If they can't do it, replace the tire.