wheel fitment

Hi all, I think I've done too much reading and completely confused myself on this topic. I'm trying to understand what I need to to do to get to a square setup on my Z4C. I have Style 108s, which I understand are ET47 front / ET50 rear, which, if I'm not mistaken, means they will always be...

I was wondering if anyone knows whether or not these wheels would fit my 2001 BMW Z3 2.5i Roadster: Front; 17x8 ET40 Rear; 17x9.5 ET15 Center Hub Size; 72.56mm (says they come with hub-centric rings) They are SSR Type-C I'm lowered on BC coilovers and would not mind having to run...