The most recent new 10.00R-20 tires were kelly Armorsteel KGR. These are the typical ribbed front steer type tires. As for the rears both Dodges have Goodyear grip type tires. Recaps on the one and virgin on the other. The other trucks have the major brands you would expect to see... Dunlop, Bridgestone, Firestone, General, but these are 22.5 and 24.5 bud style tubeless wheels. I did see a truck today with what looked to be newer 8.25-20 tires on the front. They were Sumitomo ST727. The side wall did say "Made in Japan".

I think if diameter is a concern and you are currently running 8.25-20 or 9.00-20. You would have more options in a 22.5 tubeless wheel and a low profile Radial tire that would match what you have. But new wheels add to the cost... If your trucks are geared like ours, short tires will not help you get down the road any quicker.