When I purchased my 4Runner back in 2016 I had all sorts of tire balancing issues detailed in this thread:
Tire Balancing Issues - Seeking Advice
After many attempts to rebalance them, ultimately the fix was to replace two of the tires as the dealership determined they were 'out of spec'.
So here I am 4 years later and I am with a new set of tires. I decided to go with the Michelin Defender LTX because Discount Tire claimed these were easier to balance and had fewer issues than others. I had them installed in June right before taking a 600+ mile trip a few days later. As soon as I got on the interstate and hit 65-75 MPH I could feel vibration in the steering wheel. It was really bad at 75 and enough that I found myself driving slower just to maintain a smooth ride. As soon as I got back, I called Discount Tire and told them something was wrong. They had me drop it off for another rebalance.
I pick it up after that 2nd attempt and when I get home I discover two of the wheels had scratches around the lugs in a circular pattern. I sent pictures to the manager and he said they forgot to put the rubber plate on the balancing machine and that's why the wheels were scratched. So I took it back a few weeks ago so all 4 wheels could be completely refinished since they knew the color match would be off if they only did two. Also, the vibration was still there.
So after the wheels were all refinished they balanced them again (3rd time), I drove it on the interstate this past weekend and now instead of the vibration up front I feel it in the rear. My guess is 1 or 2 tires are out of spec. The manager claims they are balanced because the machine shows "red or green" for pass/fail and they were all green. My understanding was that these road force balancers would provide values for how well the tires were balanced with pressure applied.
I emailed the manager again yesterday telling him there are still issues with the tires and I'm not sure what the next steps are. I'm not going to have them do a 4th balancing as it's a waste of my time and they may damage the wheels again. Any advice on how to proceed from here?