I bought 2 new tires in Oct. In Dec I started to get vibration at high speed. I returned to Town Fair Tire in Raynham, MA to see if they could help. They suggested switches the back tires to the front and front to the back to see if the vibration moved, too.
Long story short, it took six visits with tire re-balancing, four-wheel alignment and tire rotation to determine that I had 2 bad tires. I was never charged for anything during these visits. And both tires were replaced for free.
I have to give kudos to Chuck and Jordan for being kind and patient with me and helping to fix the problem, no matter what it took.