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OK, so here's the deal. I'm looking to get into a 17" set of wheels, and a little later I'll be going with disc brakes all the way around. My car is set up with a re-fitted 12 bolt out of a Chevelle, so it's about an inch wider than stock. Therefore, obviously, I can't use "out of the box" '69 Camaro measurements (which I hear is a bad idea anyway).
I got under there with a tape measure, and what I came up with was a 17x9" rim with 5.5" backspacing. However, in looking through the various combos in the sticky thread, I see a ton of guys running a 9.5" wide rim with a 5.5" backspacing. It seems to me that since I have a wider rearend, I should be able to run a similar rim width, but with more backspacing to fill up the wheel well (in theory, anyway). Can anyone help me understand?

On a separate note, running a non-stock rearend certainly limits your choices on wheels, unless you pony up the extra bucks for custom configurations!
 

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Is the 12 bolt one inch wider on each side or total? If total, then you need to adjust your backspace by .500" on each side, meaning you would need a 9.5 with a 6" backspace.
Follow?

If it is 1" wider on each side, then adjust the backspace by 1", so 6.5" on a 9.5" wheel. Now remember, when you are measuring wheel widths are always (ALWAYS) 1" wider than what is stated because the wheel beads are not included, so a 9.5" wheel will measure 10.5" overall. Backspace and front space however is computed from the very edge of the wheel. So a 9.5" wheel with a 5.5" backspace, will have a 5" front space.

Hope this helps.
 
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