Glad I don't get paid to do this kind of stuff for a living, hahaha
For my front brakes, I need to have a 14" diameter space for the calipers...no problem with my 17" Revolution rims....however, I only have 4 rims...I plan on ordering an extra one, but I'm guessing I won't get it for a few months.....luckly I have not done the large brake setup in the rear, so I guess if I do get a flat in the front, I can put a good tire from the rear and install a 15" spare tire in the back...man, what a PITA it could turn out to be just try to be special
I also just came to the conclusion that if I want to get another set of rims/tires just for auto-x'n, they will have to be 17" rims as well and as of now, only one company makes those...not that I have a problem with that one company (Revolution), it's just that the cost really starts to add up......