Originally Posted by Mr_D
I've never balanced the rear tires and I don't get any vibration up until 85-90 mph then I can feel some.
I know of no tire for RV application rated for 85-90 mph. I believe most if not all are rated for 75 or slower.
You have intentionally done some structural damage to your tires. You may not see a problem for months or years but if you every have an un-explained failure you need to remember you did it to yourself.
Have a good time but please don't drive near me.