[whatsnewell]

In my case (29,000 GVW) I would have to agree with Chappell.....I replaced my steer tires last March and the tire guy asked me why I was replacing almost new tires (they had over 40,000 miles on them). When I told him they were 6 years old he said "got it". They looked like they could go another 40,000 miles. I'll be replacing the drive tires in a couple of months when I get home to SoCal and they will have over 40,000 miles on them by that time. I did have to replace one of them prematurely in April due to the tread on the inside right tire beginning to separate, but the other 3 still look brand new. They will be six years old in October.