Hello to All........new to forum

I'm in the market to buy a 2.0 with a 6 speed. I did some serching but did not quite find what I was looking for.

I want to lower the car about 1" or 1.5" with 18" rims and I am courious what is the widest tire that can be run at all four corners. Not a staggered setup.

235,245,255????

Thanks in advance for any help

Mike