what size tires sizes should you run if getting the advan rg2 with the following specs?

18x8 +45
18x8.5 +50

and would there be any issues of rubbing? currently my s2k is all stock and most likely will stay that way until mid summer. I would like to lower it about 1/2 inch or 3/4 inch later but just want the rims right now. thanks for any input.

also, would 18 be too much for track days?

 

the 18x8 +45 will definatley rub.

 

Those sizes and offsets would take some work to fit and you would have to stay very narrow on tires. Not a real good fit.