When I bought my coach used I wanted to put new tires on it. I consulted with a friend who had just sold all FIVE of his Goodyear stores. His advise based upon his years of selling various brands and monitoriing tire failures was " I would not consider any tire except Michelin. They simply make a stronger, safer tire". I took his advice and bought Michelins. They are now five years old and I am going to replace them after putting 30,000+ miles on them. They still look good. I just promised myself that I would put new rubber on every five years. Some will say that is not necessary, I know. But, I have had high speed blowouts before and do not relish experiencing that in a coach on a mountain two lane road ! So, weather cracks or not, I invest in rubber every five years. Am preparing to do the FMCA / Michelin deal within the next couple of months.