I have a motor home with seven year Michelin tires and I am going to replace them next week. Michelin explains that the high pressure in the tires permeates the rubber and causes the steel cords to rust. This builds up friction between the steel cords and the rubber, which causes heat and eventually a blowout. In their sales brochure they say their tires can be recapped up to ten years. I think they say whatever they can to sell tires. If I have a front tire blowout on a 30,000lbs motor home towing a trailer and a VX, it could cost me a lot more than set of 6 tires at $700 apiece. Still if it were me, I would get a tire pressure and temperature monitoring system ($200-300) and use your tires.