re: Tire lovin baws

That's generally a balance issue. Assuming they balance them properly you might find someone who does road force balancing.

Something else to consider is moisture inside the tire. Did you have any tire work done recently. Flat repair? If a shop's air pressure system is not kept dry you can get moisture inside of a tire that will move around and give you a vibration intermittently and drive you crazy.

But a vibration at those speeds almost always indicated a tire balance problem. If it's a front tire you can feel it in the sterring wheel. The rear will be felt in the seat or floor.