I think 22s are a bit big. They look like forklift tires. I like 18s on this car. I got mine and put my wife's 18s on there just for grins. As long as you have a decent amount of rubber on them (45-50 series) I think 18s look great. Any bigger is too much in my opinion.
they gotta tuck. thats it, if you could scrape fender, like a mini truck, you CAN go as BIG as you want. its less work to lift a car over a huge set of wheels then to go through the whole thing and lay it all out on the ground. its like all those late 70's/80's dragsters that looked hella new jersy with the back bumper 3 or 4 feet off the ground over a set of M/T treads.