I'm wondering if it's possibile to install these rims & tires on a 986 Boxster without having any rubbing issues or having them stick out past the edges of the rear fenders? I'm presuming I wouldn't need spacers? The car presently has factory suspension. My factory rear wheels have the same offset (40), so am I correct in assuming they will stick out 3" further? (I have 7" rims in the back now, these would be 10"). It would seem that if this is correct, and they would actually stick out 3" further, they would be out past the sides of the car; however, I found a picture (below) of someone who supposedly has these same wheels installed on a Boxster (only difference is they aren't chrome) and they don't seem to stick out abnormally..

Here's the info on the rims & tires I'd like to purchase:
Size: Fronts 8J X 18 ET52 (225/40 ZR18) Part no: 993.362.138.00
Rears 10J X 18 ET40 (285/30 ZR18) Part no: 993.362.140.00

Any insight (or pictures if anyone has done something similar) would be awesome!!

Thanks in advance!