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Thread: Measuring for wheels/tires
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03-02-2008 #1
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Measuring for wheels/tires
On a daily driven street car, what is the minimum clearance between the inner wheelhousing/frame and the tire. In my case, the 86 Cutlass, the frame is the closest point of tire contact. Would you say 3/8" clearance is enough or 1/2"? More? I don't feel easy running any less than 3/8".
I have some tires I'm mocking into place and want to measure for my wheel backspacing.
DougDoug Gulley
66 C10 383, AFR 190, Accel SuperRam, Hyd Roller 230*/236* 280XFI, aftermarket T56, *under construction*
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03-03-2008 #2
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notch it.
i spent a couple hours cutting on my frame this weekend. it's fun.
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03-03-2008 #3
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No less that 3/8" is where I would set it. I'm right at 3/8" clearance now on the inner frame.
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03-03-2008 #4
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You can get closer with a link suspension depending on your locating device. Also tire/rim sizes. ie you can gain more clearence with a 40 series on an 17"+ than a 60 series on a 15" due to tire bulge and sidewall flex.
Hey Tony, you get any rub going into a driveway or hard turning? I'd call 3/8" a minimum.MrQuick ΜΟΛ'ΩΝ ΛΑΒ'Ε
03-04-2008 #5
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Sure don't and those were on 275/50-17's. Those have been replaced with 285/40-17's so even though the clearance is still 3/8", there should be less flex with the tire so rubbing still shouldn't be an issue.
03-04-2008 #6
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I appreciate the replies. I do plan on running a 275/40/17 tire on a 9" wheel. I had thought about notching the frame but then I'd be trying to go even bigger...LOL.
I plan on using aftermarket upper and lower control arms with some type of GW - type bushings and/or spherical setup. I also plan on replacing my worn out body mounts with the poly mounts and squaring up the body/frame side - to - side measurements.
Tony, what are you running on your backspacing?
I need my limits or things can get outta hand...faster than they normally do!!!
DougDoug Gulley
66 C10 383, AFR 190, Accel SuperRam, Hyd Roller 230*/236* 280XFI, aftermarket T56, *under construction*
03-04-2008 #7
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4.5 bs on the rears. And that's on a 9.5" wheel. The Nitto 555 runs a tad small so I went with a 285/40 to get a 26" tall tire back there.
I'm real happy with the fit, its basically flush with the unrolled inner lip.
03-04-2008 #8
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I think that's about what I measured out on my Cutlass. I'm going to replace my body mounts and get the body even on both sides before I re-measure and order my wheels just to make sure.
DougDoug Gulley
66 C10 383, AFR 190, Accel SuperRam, Hyd Roller 230*/236* 280XFI, aftermarket T56, *under construction*
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