here is a post on here you might want to look at [ http://twinturbo.net/net/viewmsg.aspx?forum=technical&msg_id=935775 ] also some more good info... - Convert the Width to mm: 10 x 25.4 = 254mm - Divide it by 2 (to get center point): 254 / 2 = 127mm - Subtract the offset from it: 127 – 45 = 82mm Now you have 82mm and that is the distance from the mounting pad to the most outside point of the wheel. Compare it to the stock wheel: 72.95mm. That is about ½ of an inch wider (to the outside only!). Now subtract the 82mm from the total Width: 254 – 82 = 172mm. This is the distance of from the mounting pad to the most internal point of the wheel. Compare it to the stock wheel: 142.95mm. That is about 1 inch wider (to the inside). So there you have it, you new wheel is going to stick out ½ inch more than stock, and is going to be 1 inch wider to the inside. Note that those wheels are 1 ½ inches wider than stock, but only ½ inch sticks out, the rest goes to the inside. found on [ http://www.nicoclub.com/archives/wheel-fitment-and-tire-size-guide-nissan-300zx.html ] Hope this helps!
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