Originally Posted by garygalla
Thanks for the info Tom but the cracks in my Michelins are actually in the tread not the sidewalls -- we would appreciate any thoughts you have on these -- tks, Gary
That is very unusual. Have you taken pictures and communicated with Michelin? Tires are constructed from many different compounds. You sidewalls also know as the carcass continues completely from side to side and runs beneath the tread. There are several ply's made from a different compound before you get to the tread compound.
The likelihood that crack in your treads would cause a sudden deflation are slim. That being said that shouldn't be happening.
I would certainly be contacting Michelin and get their opinion on it.