68 with 9inch. what backspacing? - Team Camaro Tech
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post #1 of 5 (permalink) Old Nov 1st, 09, 01:27 PM Thread Starter
Todd
 
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68 with 9inch. what backspacing?

I have a 68 with an original 10bolt and just bought a 9 inch salvaged from a versaille. I am about to buy new wheels (billet fastlanes) and was wondering what backspacing I should get. The new axle measures 52.5" flange to flange and ~58.25" from mounting surface outside the rotors. Would the standard 5.5" backspacing on a 17x9.5 wheel work or do i need to change to 4.5" backspacing to account for the axle swap??

Thanks
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post #2 of 5 (permalink) Old Nov 1st, 09, 04:43 PM
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Re: 68 with 9inch. what backspacing?

60.25" for a stock rear and you're at 58.25 so 2" O/A shorter and I will guess stock wheelwells
1" per side = 3.5" backspace since 4.5" is the norm (w/ 15"wheels).
When plus sizing to 16"+ wheels most go to 5.5" so your 4.5" "should" be right.

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1.54 60'--6.95 @ 98.45 660'--10.96 @ 121.53
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post #3 of 5 (permalink) Old Nov 1st, 09, 09:21 PM Thread Starter
Todd
 
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Re: 68 with 9inch. what backspacing?

Doug, thanks so much. They are stock wheel wells just wanted to get a second opinion before having the wheels built! Thanks.
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post #4 of 5 (permalink) Old Nov 2nd, 09, 05:02 AM
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Re: 68 with 9inch. what backspacing?

I would measure to be 100% if I was having wheels "built".

68 Camaro~LSx ~all motor
1.54 60'--6.95 @ 98.45 660'--10.96 @ 121.53
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post #5 of 5 (permalink) Old Nov 10th, 09, 06:13 PM
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Dan
 
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Re: 68 with 9inch. what backspacing?

My 68 has a 9" rear and is 59 or 59.5" IIRC, 17x9 rear wheels, 5" backspace, still needed a 3/8" spacer making it an effective 4-5/8" backspace to keep from rubbing on the inside with a 255/50/17 rear tire.

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