22.5s on open decks?

This is because you need to run 16 ply tires

 

I know what he was looking at. He was just mistaken about the tire size guys are typically running on RGNs.

And if you are telling me what I should pull to make a a living - maybe you should worry about you. I a have reasonably good handle on equipment requirements in my segment

 

Wow, a guy gives you a piece of honest advice due to his experience and you act like a Richard...
You must be the life of the party..

 

He “offered” me a piece of unsolicited advise that is totally irrelevant assuming I pull certain equipment and don’t understand the complexities of tire rating and rates for RGN

I offered the OP the answer to the question he was asking....

And lastly - who are you the party police ?

 

One of 3 possible answers here:

1. They might look like 255/70R22.5 from a distance but are actually 275/70R22.5 and have a load rating of 6395 each.

2. The machine might look big but weigh less than you think. Thus they are legal weight.

3. They are running above the load rating of their tires because they aren't smart enough to buy the right tires.

You can easily run 275 instead of 255. The tire will be about 3/4" wider and 1/2" larger diameter. If you do decide to upgrade make sure the wheels, axles, and suspension are rated to match the heavier rated tires.