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post #1 of 5 (permalink) Old 02-22-2013, 10:19 AM Thread Starter
 
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Tires

What is the widest tire that would fit without interferance on the back of a 1965 GTO? I want to use either 17" or 18" rims.
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post #2 of 5 (permalink) Old 02-22-2013, 07:27 PM
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I dont know about that size wheel but my Tempest was dropped 3"+ with 285/15 on the rear and it cleared for the most part.
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post #3 of 5 (permalink) Old 02-23-2013, 12:35 PM
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Originally Posted by Wob View Post
I dont know about that size wheel but my Tempest was dropped 3"+ with 285/15 on the rear and it cleared for the most part.
Hey Wob, aspect ratio matters a lot. Were those 285-70's? 285-60's? etc.

Bear

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post #4 of 5 (permalink) Old 02-26-2013, 02:54 PM
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I've had 12" wide slicks on the back of my '65 with no problems...mounted on Chevy rally rims with a ton of rear offset. Offset/backspacing is the critical point, here. You want wheels with 4 or 5 inches of it. There is more room between the frame and the rear axle face than there is from the fender lip to the rear axle face.
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post #5 of 5 (permalink) Old 02-26-2013, 04:50 PM
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orelog,

here is a tire calculation to help you find the perfect size;

225/60r15

225mm x .03937 = 8.85" (widest part of the tire)

8.85" X .60 (aspect ratio) = 5.31" sidewall height x 2 = 10.62" + 15" wheel = 25.62" total tire height.

Randy


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