Sorry guys, another of many question/post about offsets. I tried searching as well as playing around with the offset calculator, but don't seem to find answers to my specific question. I am not sure I really understand the calculator either. It doesn't look like it would actually work, but I figure an expert here can chime in.

Here goes:

I'm being offered wheels in the follow specs:

19x8 +30 Hancock with tires @ 225/40/19
19x10 +55 with 25mm spacers @ 245/35/19

Would these work on a 2010 G37S sedan? It's no lowered or anything or that sort. Any help will be appreciated.