*** HELP!!!! Well Just when I was bragging about my 19.5 wheel and tire setup I am back to where I started in my earlier posts here on this thread regarding vibration and shaking at speeds between 58 to 70 mph empty no load after just having tires rotated and not balanced after the first 5000 miles since firestone cannot balance these tires when tires have balancing media inside. Had my local firestone rotate them since I bought the lifetime rotate/balance /alignment package in 2009 before the TC lifestyle. On my return trip home from upstate New York The Vision wheels Dyna trac 890s ride was better, still had a little vibration and shaking at around 55mph and around 68 mph. Not as bad as before Commercial tire air downed and reseated the tires. keep in mind I thought I was still breaking the tires in... Got back to Dallas and truck empty ride was preety good, little vibration again but thought maybe could be front end issue again. Took the truck another shop where I had all of my trucks front end redone and has a certified Cummins tech and he checked the whole front end. Everything checked ok. Asked them if they could recommend of a local commercial tire shop that deals with 19.5s and recommended Plano tire here in Plano, Texas. Brought Truck down there and told them my situation. Got me in right away and advised me to have the balancing media removed from all the tires and then balanced with their hunter machine. I agreed and later that day went down to pick it up after they called and said truck was ready. Asked if they test drove it and said no they did not but should be all good. since it was closing time I told them I would test drive it now and they said just call next day if I have any problems just bring it back.