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Tire Fit issues

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Old Apr 28, 2009 | 07:21 PM
  #1  
jjohnston's Avatar
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Car: 91 Camaro RS
Engine: 305
Tire Fit issues

I have a 91 Camaro RS. I got some 4th Gen rims. After doing some searching on here I found I needed 2" spacers for the rear to make the offset correct. But didn't see anything about the front. I got the backs on and they look and work great. But the fronts won't fit, can't get them on because the tire hits the suspension. Can these rims fit, do I need spacers, if so how big before the front/rear offset is wrong? Can I just get new narrower tires for the front??
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Old Apr 28, 2009 | 07:32 PM
  #2  
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Car: 91 Camaro RS
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Re: Tire Fit issues

Oh, I did see that front tie max width is 255 and my tires are 275... So can I just simply put 255-45/R17 tires on the front, and stick with the standard 275-40/R17 in the back? And will that allow me to not have to use any spacers up front??
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Old Apr 28, 2009 | 07:41 PM
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From: ontario
Car: 87 iroc
Engine: 350 with weiand 144
Transmission: tremec TKO 600,mcleod street twin
Axle/Gears: strange s60
Re: Tire Fit issues

Yeah, you don't need those snow plows on the front.
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Old Apr 28, 2009 | 08:12 PM
  #4  
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Car: 91 Camaro RS
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Re: Tire Fit issues

Ok, so this will get them to it then? No other mods
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Old Apr 28, 2009 | 08:25 PM
  #5  
//<86TA>\\'s Avatar
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From: Central NJ
Car: 86 Trans Am
Engine: 408 stroker sbc
Transmission: TKO600
Axle/Gears: Moser full floater m9, 3:70 trutrac
Re: Tire Fit issues

Changing the tire will not magicly make the rim narrower, the offset is just wrong

the fronts will fit fine, you just need spacers.
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Old Apr 28, 2009 | 08:38 PM
  #6  
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Car: 91 Camaro RS
Engine: 305
Re: Tire Fit issues

But more narrow tires will make the tires more narrow. So if the curent tire is 275, and I change it to 255 width, that is 20 mm difference which is about 10mm per side, that would mean 3/8" further from the back. I don't know if the rim would hit, or not. and I know I'm not the only one doing this swap, so I figured someone here would have done it, and could tell me what they needed to do.

Maybe a combo of spacers and tires... spacers only... And how big of a spacer...

Sorry, I'm new at this.
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Old Apr 28, 2009 | 08:43 PM
  #7  
//<86TA>\\'s Avatar
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From: Central NJ
Car: 86 Trans Am
Engine: 408 stroker sbc
Transmission: TKO600
Axle/Gears: Moser full floater m9, 3:70 trutrac
Re: Tire Fit issues

i hate to have to keep telling people to search, but seriously, this has been covered thousands of times.

They are 4th gen offset wheels, they need spacers, i really doubt 10mm will help you at all. The spacers are generally somewhere from 2 to 2.25" depending on the offset of the wheels you have.

bet way to do it is so sit the wheel in the wheels well at about where you want it to be, maybe a half inch or less from the outside of the fender, then grab a tape measure and see how wide the gap is from the rotor to the back of the wheel and thats the spacer you need.

Doing this with the car at ride height and the suspension loaded would be best
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Old Apr 28, 2009 | 11:54 PM
  #8  
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From: MASS
Car: 87 Camaro
Engine: 5.7 350 TPI
Transmission: T5
Axle/Gears: 3.42
Re: Tire Fit issues

try this site it helps with all the info on backspacing and offsets etc
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Old Apr 29, 2009 | 08:35 AM
  #9  
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Re: Tire Fit issues

I found this site very helpful.

http://www.skulte.com/adapterfaq.html
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