You can see the wheels at www.nissanusa.com
Select "Altima Coupe", then "build you car", then look at the 3.5 SE model shown, those are the stock 17" wheels for the SE model. The tire OD is the same as the stock NAH Contis.

I didn't want to go w 18's because you will have a larger OD and I didn't want to risk the "hybrid warranty" if you know what I mean!

Personally, when I ran the Contis at a higher pressure, they scared me....