I'm not going to get into the sizing, it will always vary, depending on the actual style of the wheel, not just actual spacing, offset, etc. However, you mind if I ask what kind of price you are looking at? My Origins, which are a similar style, are 17x9, +30 front and rear. They wouldn't clear my front brakes (same as Z32) or coils, without 10mm of spacing. However, like I said, it will always vary.