Help! What size wheels are these? Im a newbie...

Thanks all, I had a suspected they were the 19.5's. Dodge Guy is correct, I am searching for my first RV and from what I have learned reading all of the great info on this site, I may as well just expect to put new tires on all around. Also good to know there is possibly 225/70/19.5 option, I will check the spacing to see if it can work!

Thanks again!