Bought my first set of Michelin medium truck tires on recomendation from this forum and put 70,000 miles on them, many on rough roads with a heavy TC. Was very satisfied and replaced with a similar Michelin tire. Also very satisfied. Repaced the first set because they were down to the wear bars but had a look at the carcass when being replaced and they looked brand new.
None of the Michelins have shown any issues regarding cracking of the side walls.
I will replace with another set of Michelins when the time comes,even if I have to pay a bit of a premium.
Dave