Let me know if they are available in 22.5".
I have done some extensive searching and 19.5" is the largest I know of that is available new.
Not all multiple piece wheels are bad.
If they split in the center and look like two identical halves then they are the dangerous ones. Don't play with those.
If they have 1 or two small bands that snap in at the very edge of one side of the wheel they are the useable ones as long as nothing is worn or bent out of shape. I would keep them if you have them.
An 8R19.5" tire on the available 19.5" rims are only about 33" tall. Nothing available taller for that rim. If you want to go as fast as you did before stick with what you have, about 37 or 38" I believe.
