Szpet

I have a 964 3.3 and bought a set of wheels.

The fronts are 8.5 ET61 and the rears are 9.5 ET48.3. I´m just about to order tires and wonder if 225 and 285 will fit. I´m going to lower the car and want to avoid rubbing. Will spacers be needed in front or rear?

I have been searching here but can´t find any answer that makes me 100% sure what will fit best.

Thanks