carringb wrote:
I'm nor sure there is a brand that is less crack-prone that others. Your best solution is applying 303 or other UV inhibitors, and covering the tires when parked.
And then again, I had the same set of Cooper tires on my 4X4 pickup for 12 years or so uncovered with no 303 on them (...and I even occasionally put the El-Cheapo black shiny stuff on them so they would "look good") sitting out in the CA sun and they never had any sidewall cracks at all - the tread finally wore out. Go figure.
I'm hoping beyond hope that the seven new Michelin LTX M&S2 tires I recently put on our Class C don't develop sidewall cracks. The M&S2 sidewall ply material has been changed to some high-tech sounding material so maybe Michelin did their homework on sidewall cracking.
I don't believe that steel sidewalls have anything to to with it and steel sidewall commercial tires usually come with only a fairly smooth highway tread. IMHO, a M&S type tire tread is ideal for an RV so as to be ready for any reasonable road surface condition at any time, anywhere.
