I'm planning to use 17z with ML320 330mm rotors, and i'm concerned about 3 questions:
1) Does the 17z fit without spacers into the OZ Ultraleggera 18" (ET48)?
2) Will I need to grind the calipers? Or it's just needed to the 18z?
3) What exactly do I have to grind on the centering rings to fit...