I have Michelin tires installed new in April 2013. Noticed this weekend that the left front tire is starting to show sun/weather cracks. Not sure why, as the MH doesn't sit parked for more than a coup...
It is called a zipper crack. Not weather checking. Michelin tires are notorious for this issue. Get a call in to Michelin head office and see what you can negotiate for a settlement . Take that money and put toward a set of new tires from another manufacturer. This is exactly what we did.