Funny Thing (Not Really).. Just had the same thing but worse yesterday here in Wyoming also.. My tires were the Tow Max, 2 years old this month. I always check pressure before each trip and inspect them. Tires look fine, no odd wear & tear on them. On the way home the front passenger side tire blows apart as I am heading down interstate at 65 mph. Tore up the lower metal wrap for about 14 ft , bent a bracket, tore up cover on underbelly and also messed up access door on water heater. Luckily I am only 5 miles from the next town. Put spare on and move on to next town. Pull over in town to get drink and look at tires again. Notice that both tires on drivers side look odd on the tread area. Find the only tire shop in town and the guy looks at them and says "yep, those are starting to separate also". Luckily he was able to fit me in before closing shop for the day. So I ended up buying 4 new tires. Had LT's put on. Turned into an expensive weekend, but no one got hurt.. A 4 hour drive home turned into an 8 hour drive. Meeting with insurance guy tomorrow morning...