I had a ragged 360 deg, full circumference crack, right where the outside sidewall meets the edge of the tread, on all 4 x corners of the 225 mm oem michelins on my 2011 Fusion. Pass side rear developed a slow leak, which became much faster. My tire guy said all 4 were toast, or gonna be soon. On the oem tires, instead of a ragged crack, there was a tiny bead of rubber sticking out aprx 1mm. I was not impressed, as their was bucket loads of tread depth left. All 4 corners had developed side wall separation. Inflated correctly and checked on a regular basis. Wife uses that car to run errands around town etc, it's just babied. I only got 5 years out of them, and barely 25k miles.