I used to run a 225 on a 7.5 inch wheel(it was recommended OEM) so it should work on a 7inch wheel just fine. Depending on the brand of tire, it might bulge ~slightly~ since each manufacturer has a different size footprint even though the size is technically the same. In any case, they should not be a problem.
As for rubbing, it may depend on what suspension setup you have. YMMV