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Old Jul 15, 2005 | 09:17 PM
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camaro86's Avatar
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From: socal
Car: 91 z28
Engine: 350 tpi
Transmission: 700r4
18" tires

can i run 245/40/18 in front and 275/40/18 in the rear with some 18X8.5 irocs all around? Will it look good with a 40 sidewall all around? can you all post a pic of a 40/18 all around. and is anyone using a 45 sidewall on 18" wheels will it look good and will it fit?

Last edited by camaro86; Jul 15, 2005 at 10:08 PM.
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Old Jul 15, 2005 | 10:41 PM
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Teenfixing88RS's Avatar
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Car: 1988 Camaro RS


285/35/18 out back

285/30/18

hope this gave u some sort of idea
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Old Jul 15, 2005 | 11:01 PM
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camaro86's Avatar
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From: socal
Car: 91 z28
Engine: 350 tpi
Transmission: 700r4
so is 45 sidewall to big? what about 40 sidewall all around will it look good?
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Old Jul 15, 2005 | 11:04 PM
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From: Changing Tires
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Here is 245/40/18 on 18x8. Should work great with 18x8.5's too:



In the rear I run 275/35/18 on 18x9.5's. I'm not sure if you can run 275/40 or 275/45 on a 18x8.5 would have to check the tire spec sheet. If you did it would be taller than stock. I got my specs from trying different combos in the online wheel calulators and trying to stay as close to stock overall height as possible. Even though I run 40 series in the front and 35 in the rear, because the overall heights are very close, they appear even.

Last edited by CrazyHawaiian; Jul 15, 2005 at 11:09 PM.
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Old Jul 15, 2005 | 11:20 PM
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camaro86's Avatar
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From: socal
Car: 91 z28
Engine: 350 tpi
Transmission: 700r4
i think that i will go with 245/40/18 front and 275/40/18 rear.right now i have 255/60/15 rear and is 27.0in tall and 275/40 is 26.7in tall.
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Old Jul 16, 2005 | 12:21 AM
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From: Canada winnipeg
Car: '91 vert RS, '82 Z28
Engine: TBI 305, TPI 350
Transmission: Auto, 5 speed
Originally posted by Teenfixing88RS


285/35/18 out back

285/30/18

hope this gave u some sort of idea

dont spose you have any more pics? looks good.
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Old Jul 16, 2005 | 01:03 AM
  #7  
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From: san jose, ca
Car: 1990 IROC-Z (De-Badged-Carbon Hood)
Engine: Superram 383
Transmission: T-56 w/upgraded Viper Internals
Axle/Gears: 3.73 18x8 and 18x11 irocs
255/45/18 all around:


Last edited by Mr. IROC-Z; Jul 16, 2005 at 01:54 AM.
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Old Jul 16, 2005 | 03:03 AM
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Zepher's Avatar
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From: Norfolk, VA. USA
Car: 86 Trans Am, 88 Formula
Engine: 95LT4, 305TPI
Transmission: T56, T5
I've got 275/40/18 on the rear,


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