brlowe wrote:
I looked at the 235/85 tires before and they were slightly wider and there were reports of them touching each other under load...
...normal E rated tire and put it up front keeping the duallys matched.
Yeppers, I wouldn't do 235/85 without a lot of investigation. And I'm glad you understand keeping the dual tires matched. FWIW, I believe the Right Rear Inner leads the toughest life of all six tires. Assuming of course we don't run them into curbs and stuff! Right Rear Inner carries a little more load than the Outers, and so does the Left Rear Inner. Differences are: First, we "occasionally" run Right Rear OUTER off the edge of the pavement. When we do that, the INNER gets shock loaded into the full weight of the right side of the rear axle. Second, at least on the Fords, it's right next to the hot tailpipe.
We have those
Wonderful BORG Dually Valves so it's hard to do a full tire rotation. I've rotated Spare to Left Front, Left Front to Right Front, Right Front to Spare just to get use out of Spare as it ages. Thinking of what I just wrote, think I'll rotate the Rears after all. Take both Rights as a Set and rotate to Lefts as a Set.