I am about to upgrade from 16" goldies rims to 17" rims. When I get new tires, What size tire wall should be good to keep from rubbing. Stock tires are 205/55-16. Would 205/50-17 keep the overall size roughly the same or should I go smaller?
I personally would go no more than 45 sidewall on a 17. But it really depends on the owner. Depending on what offset wheels you buy, your ride height and suspension setup (coilovers vs struts) a 205 with a 50 sidewall might work and not rub the fenders on the outside but it could very well hit the strut/spring perch on the rears on the inside. I think with a 205 you should be OK but since I never ran that size tire I cannot be for sure so again I would play it safe and go with the 45 sidewall, also with a 17 you could go wider with a 45 like 215 or 225 and be OK.
I've always run 215/45/17 on my cars, and have recommended other GC guys I know to do the same. More width, pretty much the same sidewall height, and honestly they look better and fill out the wheel/tire package better, IMO.
Only time I've had rubbing issues with them was on a set of +38 offset wheels with no fender work.