TwinTurbo.NET: Nissan 300ZX forum - Never mind. Found a 'calculator' that tells me what I need
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Subject Never mind. Found a 'calculator' that tells me what I need
     
Posted by Zxpress on July 18, 2021 at 11:44 AM
  This message has been viewed 173 times.
     
In Reply To Which wheel combination? posted by Zxpress on July 17, 2021 at 11:50 AM
     
Message Did a little more digging and found this. It helps you calculate how far the inner and outer lip of the wheel is going to sit compared to stock.

Copied an excerpt from the post:

Lets take a 17” x 10” 45mm Offset wheel for an example to replace the rear wheels:

- 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.

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