What is the offset of the wheels? If you have no idea what I'm talking about, grab a wheel, search the inside of it for some print saying "ET??" (for example ET25). Saxos need wheels with offset 15mm - 18mm (ET15 till ET18). For more info on offset read
this.
If the wheels are for example ET35, you need 35 - 15 = 20mm spacers. If they are ET25, you need 25 - 15 = 10mm spacers. I currently have ET25 wheels, and have no scrubbing problems, but best to fit some spacers on the rear.