[DeTomaso] Offset versus Backspace (was Re: What is the widest wheel I can run . . .)

[asajay at asajay.com]

So let me clarify my question a bit.

How can a 9 inch wide rim, have an offset of 0.000 mm -and- a  
backspace of 5.00 Inches?

If it's 9 inches wide, and the offset is 0, that means the hub  
mounting surface is inline with the centerline of the wheel.  If that  
same surface is then used to measure the backspace, shouldn't it be  
4.5" since that is half of 9?


Can you see why I'm confused?

Asa Jay
<likes to think he's good at math, but often finds out he is not.>


Quoting asajay at asajay.com:

> On a stock bodied Pantera L?
>
> It has 15x7 and 15x8 (front/rear) now.
>
> How wide can I go in front versus how wide in the rear?
> I've also read all the articles on offset and backspacing, and I'm
> still confused.  What is the real difference and what do I want in an
> aftermarket wheel to fit properly?
>
> I'm looking at inexpensive rims for just racing.
> Thanks,
> Asa Jay
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