same story here,,,my first set of Michelins LTX AT went 100,000km's,,,,the next set went about 70,000 km's,,the last 2 sets maybe 50,000km's,,,it seems Michelin tires about steadily going down in quality the las t 6 or 7 years... my cousin who works in a shop that sell and installs a lot of truck tires was telling me the same thing,,,his customers are complaining more and more about Michelin quality,,,most every one has also noticed that by half tread wear,,the ride quality goes down a lot and the rubber turns hard as a brick,,,so i'm pretty much done with Michelins,,,seems like a another big tire manufacturer who seems to be engineering there product to last less and less so they can sell more tires,,,
I keep hearing great things about the Firestone Transforce,,,i may try them next,,