Factory installed tire which side wall dry rotted quickly, after 3-4 years on an RV which was covered up from the sunlight while in storage. Never had any tires rot this soon or like these in all my years of owning tracks and motor homes. I have read hundreds of complaints of others who have owned these Michelin tires with the same problem. I'm buying Goodyears to replace these junkers! I have never had any problems with Goodyear tires and have owned them on my other vehicles for 30 years.