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Track wheel offset question on a '94

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Old Oct 28, 2011 | 11:14 AM
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Default Track wheel offset question on a '94

I'm looking for track wheels to use with the '94 I just picked up for a dedicated track car. It came with staggered C5 wheels, but I want to switch to a square setup. Based on my research here, I know 18"x10.5" (C5 Z06 rear size) will fit fine on all 4 corners. That being said, I stumbled across a form vendor selling new sets of TSW forged 18"x10.5" wheels that should fit, but the offset is slightly different... Here's a link for them: http://forums.corvetteforum.com/auto...ht-wheels.html

I'm guessing these wheels will work fine, but will probably need spacers to clear properly. What do you guys think?
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Old Oct 28, 2011 | 03:36 PM
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I can't answer your question on the offset but have you priced a used set of OEM Z06 18x10.5" wheels. Probably half as much.
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Old Oct 28, 2011 | 04:27 PM
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I think the 94 C4 offset is 36mm front and 56mm rear. Are spacers on a track car a good idea?
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Old Oct 28, 2011 | 05:33 PM
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Finding a set of 4 OEM Z06 rears is tough - I've been looking for a while. I want to go with a square setup so I can rotate wheels (plus most scrubs are 18's these days) - trying to keep consumable costs down. The forged wheels should also be stronger (and lighter) than the OEM wheels which are cast. As for the spacer issue on a track car, it's not a problem... The car has upgraded wheel studs, so running a spacer won't be an issue.

I'm thinking I'll need a spacer just based on the offset numbers, but any feedback you guys can offer would be appreciated
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Old Oct 28, 2011 | 06:23 PM
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Try sending a PM to BrianCunningham. He has a supercharged LT strocker and races on 315/35/17 tires front and rear. His suspension, wheels, etc is all set up strictly for racing and he is very knowledgeable and a good guy.
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Old Oct 28, 2011 | 08:20 PM
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If they are in your budget it should be fine without a spacer.
I run 4 c5z rears and 4 rear wagon wheels on the 92 both with 275/35R18 Hoosier tires on both sets of wheels.
If I was finicky I would run a thin spacer on the rear cause they sit in a little bit.
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Old Oct 28, 2011 | 08:25 PM
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Originally Posted by jaa1992
If they are in your budget it should be fine without a spacer.
I run 4 c5z rears and 4 rear wagon wheels on the 92 both with 275/35R18 Hoosier tires on both sets of wheels.
If I was finicky I would run a thin spacer on the rear cause they sit in a little bit.
I dont have C5Z rears but I have fit wagon wheels on the car. They do sit a tad inside but it is only a cosmetic issue and does not hurt function. I also have a set of 4 FRONT C6Z wheels which are 18x9.5 40mm offset and that is a perfect fit in my opinion.
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Old Oct 30, 2011 | 08:52 PM
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I'll be the first to admit I'm new to the C4 board... That being said, what are "wagon wheels"? As for spacers, 1/2" spacers are what I was figuring based on the offset difference. That being said, why would you suggest I only run the spacers on the rear? I'd think I'd want to run them on all four corners...

Thanks for the feedback guys!
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Old Oct 30, 2011 | 09:59 PM
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I've reread the thread and redone some math! The C5Z 10.5 @ 58mm I understand is a good fit to the C4 and the 65mm wheels you've linked to would need a 7mm spacer for similar fitment. I think I'd maybe shop a little harder for a fitment that I could use with no spacers. I don't believe I'd want to use a spacer 7mm thick because you would loose the hub center fitment I believe. A 1/2" spacer would result in maybe a worse situation.

I would think you would want to maintain the hub centric fit of a quality wheel when used in what you mention is a track-only build. I'd keep looking and if yo decide to go to an after-market wheel spend the additional required to get a fitment that won't require considerations of spacers.

It will be money "well spent"!!

Last edited by WVZR-1; Oct 30, 2011 at 11:06 PM.
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Old Oct 30, 2011 | 10:38 PM
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We know people are running C5 Z06 rears on all 4 corners for track duty, and they supposedly fit with no spacers... Here's a thread discussing the issue: http://forums.corvetteforum.com/c4-t...fications.html

The C5 Z06 rears are a 58mm offset, so I don't see why the TSW's would be a problem with a 65mm offset (with the exception of needing to run a small spacer)? Between people running the C5 Z06 rears on all four corners and TSW saying these will fit a late model C4, I was under the impression the wheels I was looking at would be a good fit - but was just looking for confirmation from the forum.

For what it's worth, the tires I'm looking at running on these are Continental 285/35 slicks.
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Old Oct 30, 2011 | 10:58 PM
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Originally Posted by gtb75
I'll be the first to admit I'm new to the C4 board... That being said, what are "wagon wheels"? As for spacers, 1/2" spacers are what I was figuring based on the offset difference. That being said, why would you suggest I only run the spacers on the rear? I'd think I'd want to run them on all four corners...

Thanks for the feedback guys!
I don't have a picture but if I look at my rear with the z06 rear wheels and the 275 hoosier on it its about 1/4" in from the top of the wheel arch. The wagon wheels are maybe 3/8" in from the top of the wheel arch. Like I said if I was finikey I'd run a thin spacer, maybe 1/4" MAX.
But it doesn't affect handling so I leave it alone.

Wagon wheels were the first c5 wheels.
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