86 535i Offset size for wheels

This car still has the original Rims and Tires, Seeming the tires that fit the rim arn't sold anymore..... Its time to upgrade..

I'm Still not to sure how this wheel size off center hub centered stuff works.. lol, bare with me. :)

Would Like to know if Theses will fit...

Bolt Pattern 5-120, Which will fit. :)

Fronts are 18X8.5 with 225/40/18
Rear are 18X9 with 255/35/18

M3 style BMW rims

If not..... Spacers?

Thanks