This is a 9.5 with 35mm offset. It is a very tight fit on stock suspension as the wheel might hit fender. This is why I want to get rid of it and go with a 40mm or 45mm offset to be safe.
It doesn't matter if they are 18 or 19 or 20. The offset/width is all that matters really. I guess you can say some 18" might not clear over the calipers