My little brother sold me what he say's are the most popular closed shoulder drive tire, and I am going to "break them in" for one of his best customers. I am now running a set of Kelly KDA in an 11R24.5 14 ply on new white steel wheels. I got tired of not being able to check my tires with a tire gauge without having to go through contortions just to get the valve cap off. The steel wheels have holes large enough for me to get my hands inside. I did have to raise one of my fenders but all else is fine and the couple short runs I made on the bypass at highway speeds were very smooth.
I have gained 5 mph in top speed (before the speed governor kicks in) and can see a 5 MPH difference in the GPS vs Speedometer. Should be able to cruise in the sweet spot a little easier.
The link should show you some photos of the new skins.