Ya, I know about the cost! The rest of the story was the local Farm Bureau dealer asked if I wanted to try a set of radials on the rear and I, being dumb and stupid, thought there couldn't be too much difference in price - right? I mean, look at the price difference in bias ply and radial ply passenger car tires (for those old enough to remember bias ply tires).
Anyway, I said sure, I'll try them. Well, let me tell you, the difference in price for those 20.8X38 tires was about a $800 each!!!! I don't think I'll fall into that trap again but I will have to say they work great.
The tires I have on the other two tractors have been on for 15+ years and the bars are still pretty good. They are starting to dry rot though and will have to be replaced in the next few years. Won't be with radials though.