There was no instability that we could decern and they lasted 3 winters. My wife was more upset than me when those tires were discontinued (we had 2 sets before they were discontinued.) This is our first year with the Mickey Thompson Baja Boss AT's so we'll see in a couple years how they hold up and how they do in the winter. So far so good and a 50,000-mile warranty. That is something we didn't get with the MT tires.