PeoriaKen,
May I ask, what "Type" of wheels do you have? Are they steel with Stainless steel wheel liners or, are they "Aluminum"? If, they're Aluminum, it's possible that, (like ours) there is a stamped number on the lug nut caps, (that is if you have caps). On mine there is a "33" on them. That is, mine are 33 mm lug nuts. The same, or very, very close in American sockets is a 1 5/16". This is assuming that because you have 22.5" wheels, your lugs will be the same as ours. Just guessing here.
Scott
P.S. Use a tape measure and measure across the stud, from a flat surface on one side to the exact opposite on the other side of the lug nut and see what you get.
Scott