I only buy Michelin PS4S and had one tire with that type of damage, only worse. It looks like my alignment on my left-front wheel is a little off, but I never bother with alignments anymore unless there is damage to the suspension. You can buy two of my tires for the cost for alignment and checking the "advanced driving features". I'll assume you're careful about tire pressures. I check mine every couple of weeks and adjust them to the predicted temperatures. Since my car sits in a garage most of the time, I have a thermometer on the wall, so I don't get higher sun-induced starting pressures. I was surprised my tire shredded, but I usually change them out when they get to 4/,32". I let the last ones get down to 3/32, and that's when I had the problem. All I can suggest is, don't go lower than 4/32". These tires are the lowest profile I ever owned, and I noticed even taking turns mildly causes the front tires to roll over and round the edges. I also do not rotate them, since at least for me the tires wear evenly, thanks or no thanks to the mostly full-time AWD. You'll still get the rounded edges once they wear down anyway, and you'll have 4 rounded tires instead of two. A harder tire will probably hold up better, but you'll sacrifice handing and wet weather traction.