We have a 2011 Newmar Dutch Star 43'. While on a trip, the man next to me noticed a bubble on my front drivers side tire. I called Good Sam to help me. They sent someone out and he put on a new tire for me. He said my tires were made in 08 and I should get new tires. I bought this coach new and I am NOT a happy camper. My tire size is 305 70R 22.5 Michelin XRV. I want to put all new ones on now and can not find any in my size. A dealer said I could buy Toyo for the rest of the tires and it would be o.k. Can you have one Michelin and 7 Toyo tires? Everyone tries to take advantage of older people, I have found out.