Tire noise... or so I thought
I need assistance diagnosing what I thought to be tire noise. I want to restore my ultimate driving experience.
Backstory: I had Michelin Pilot A/S tires on my car with 35k miles on them. Over the past few months, the road noise went from "tolerable" to "I can't hold a conversation". Thinking it was just uneven wear, I had a new set of Pilots put on the other day.
The noise has improved somewhat, but when I get up to 40mph the purring starts. By about 60 mph, it reminds me of a propeller plane engine humming along. It doesn't matter what road surface I'm on. It sounds like the noise is coming from the rear wheels. I also have slight vibration that was not present before.
Any ideas on what I should have checked out? Is this something I should take up with my indy shop? I am just looking for some suggestions so that I don't get scammed.