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Wheel offset ? 15x8x+-?

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Old Oct 29, 2004 | 11:19 PM
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Default Wheel offset ? 15x8x+-?

does anyone know the factory offset for stock alum. wheels? '78
I want to buy some temporary steel wheels to use while my aluminum ones are being chromed. ie: what other junkyard wheel fits?

Last edited by David Ey; Oct 29, 2004 at 11:23 PM.
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Old Oct 29, 2004 | 11:22 PM
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4.75" offset...
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Old Oct 29, 2004 | 11:25 PM
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OK, is that the same as a plus 3/4 inch offset?
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Old Oct 29, 2004 | 11:32 PM
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Originally Posted by David Ey
OK, is that the same as a plus 3/4 inch offset?
Eh?

Tell ya what, just get some wheels from any 68 and up Corvette, guaranteed to fit.
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Old Oct 30, 2004 | 09:54 AM
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I have a set of 15X8 rally wheels (245-60 rear and 225-70 front) if you're interessted. Three tires are in good condition, all three are Dunlops, one front was obviously the spare tire at some point in time, different brand and shot...
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Old Oct 30, 2004 | 10:17 AM
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Originally Posted by GDaina
4.75" offset...
Backspacing, you mean!

Offset is a completely different animal, David.
It has to do with the mounting surface of the wheel and its relation to the centerline.
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Old Oct 30, 2004 | 10:36 AM
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Here is something to chew on:

Measuring Wheel Offset
To calculate offset you'll need the following measurements:

Wheel backspace
Wheel Width
Wheel Center line (outboard flange to inboard flange measurement / 2)

Subtract:

Wheel center line from Wheel backspace to get offset. If backspace is less than the wheel centerline the offset is negative
If backspace is greater than the wheel centerline the offset is positive



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Old Oct 30, 2004 | 11:25 AM
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Originally Posted by Summerfun
Backspacing, you mean!
Yep, that's what I meant.....as I said before, get 7" or 8" wheels from any 68 and up and you won't be bothered with measurements....
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Old Oct 31, 2004 | 09:29 PM
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Buy my "Pace Car" wheel set for $175 and have a matching extra set for your drag slicks! I can Email you photos if your interesed. They have a set of 275/50/15 Hoosier RS03 autocross tires on them (but 2 are "corded" and not really useable.) I am also giving you the correct lug nuts and center caps (lug nuts are about $3-4 each so there are $60 worth of lug nuts included!)

Last edited by Solid LT1; Oct 31, 2004 at 09:39 PM.
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Old Oct 31, 2004 | 09:46 PM
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Thanks for your input guys.
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Old Oct 31, 2004 | 10:49 PM
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Originally Posted by GDaina
4.75" offset...
1/2" Negative offset
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