there maybe some truth to your words. I found out that my back right rim is a little crooked and the rest 3 tires are not evenly worn out.Have you tried just changing the front wheels with the rear wheels to see if you have a wheel or tire issue. I experienced a similar problem after replacing winter tire/wheels by summer tire/wheels and doing a tire rotation at the same time. One of my front tire/wheel was the cause of the steering vibration.
no boundaries no borders - wrangler