Thanks for the info on the Good Years. I, also had problems with Firestone. Seems like you and I have been driving about the same, me since 1952. Firestone's came with our '75 Wagoneer. That was one tough Jeep, the only thing ever wrong with it was the body rusted away, couldn't kill the drive train. Anyway, back to tires. Firestone's would last about 20,000 or so miles and the casing would separate from the tread. Happened twice as Firestone stood behind them. Then switched to the new (then) 721 Firestone casing. That made a big difference, but I eventually went to Michelins. And since we moved to the mountain and have a damnable time with ice from January through March, I've had much better luck with Cooper Discovery. Best to you and good luck.