My '72 Jeep J4000 has some wicked tires on it. The fronts are dunlops and the rears are uniroyal. Both sets have the most agressive tread I've ever seen. The lugs on the edge most likely had a 1.25 or 1.5" depth. They are a heavy load range tire (at least a 6 ply). They are not too loud on the hard road. Unfortunately, they are cracked real bad and all leak real slow (usually a refill twice/winter is needed). The problem is that I think that this is the last year with them. I would really like to get something similar since the truck will never see a paved road again. The truck does snow in winter and firewood in summer. Any thoughts out there? I have no idea what the age of the tires is.