I have a 1979 brat. Going to lower it as far as comfortably possible. My question is, if I keep the stock rims, what is the widest tire that will fit on those rims? Don't care about outside fenders rubbing cuz I can trim those as needed. Just wondering the max tire width that those rim will fit. Also, anyone know of companies building wheel spacers? P.s. I'm actually Caucasian.