Zero offset on 8 inch wheel will get you a factory fit, or at least very close since the rears ran a +16mm offset. Zero offset will also be called 4.5" backspace, this includes the lip (usually 1/2") and half of the wheel width.
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Project round two: 1992 Chevy Camaro
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Post Slut
- December 9th, 2011
- 5919
- Michael H
- 1989 Iroc-Z Convertible/1998 Z28
- Lowell, MI
- Meat Processor
- Send PM

1998 Camaro Z28 - Bright Red, 6.0 TR224, 4l60e, 3.42 Eaton TrueTrac
1989 Camaro IROC-Z Convertible - 355 big tube TPI, WC T5, 3.42 Zexel Torsen, CTS-V/C4 brakes
1955 Bel Air 2 Door Post - 357 TPI, Muncie M20, 4 wheel disc
2006 Saab 9-7x 5.3i Daily Driver
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ok what about on a 9.5 inch wheel? Because if I have a choice that is what I will get.sigpic
1992 Chevy Camaro 25th Anniversary-SOLD
1992 Chevy Camaro 25th Anniversary
1997 Chevrolet Corvette
The Original
Originally posted by meissenI actually agree with Darren on everything he said...Originally posted by 81DaytonaPaceCarYep, pretty much...not too often I agree 100% with Darren, but there it is...
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Post Slut
- December 9th, 2011
- 5919
- Michael H
- 1989 Iroc-Z Convertible/1998 Z28
- Lowell, MI
- Meat Processor
- Send PM
Roughly a +38mm offset, or 5.75" backspace for stock rim face location. It really depends if you want to tuck the wheels or go for the flush look.
1998 Camaro Z28 - Bright Red, 6.0 TR224, 4l60e, 3.42 Eaton TrueTrac
1989 Camaro IROC-Z Convertible - 355 big tube TPI, WC T5, 3.42 Zexel Torsen, CTS-V/C4 brakes
1955 Bel Air 2 Door Post - 357 TPI, Muncie M20, 4 wheel disc
2006 Saab 9-7x 5.3i Daily Driver
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ok so I got this right.
Stock bolt pattern (obviously) 8 inch wheel 0 offset or a 4.75 backspace, 9.5 wheel im looking for 5.75 backspacing?
What are 4th gen wheels?sigpic
1992 Chevy Camaro 25th Anniversary-SOLD
1992 Chevy Camaro 25th Anniversary
1997 Chevrolet Corvette
The Original
Originally posted by meissenI actually agree with Darren on everything he said...Originally posted by 81DaytonaPaceCarYep, pretty much...not too often I agree 100% with Darren, but there it is...
Comment
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Post Slut
- December 9th, 2011
- 5919
- Michael H
- 1989 Iroc-Z Convertible/1998 Z28
- Lowell, MI
- Meat Processor
- Send PM
4th gen 16x8 have +55 offset. The Eagle 077's on the blue car are 17x8 but with a +38mm that sits almost flush with fendersOriginally posted by Darren View Postok so I got this right.
Stock bolt pattern (obviously) 8 inch wheel 0 offset or a 4.5 backspace, 9.5 wheel im looking for 5.75 backspacing?
What are 4th gen wheels?
1998 Camaro Z28 - Bright Red, 6.0 TR224, 4l60e, 3.42 Eaton TrueTrac
1989 Camaro IROC-Z Convertible - 355 big tube TPI, WC T5, 3.42 Zexel Torsen, CTS-V/C4 brakes
1955 Bel Air 2 Door Post - 357 TPI, Muncie M20, 4 wheel disc
2006 Saab 9-7x 5.3i Daily Driver
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damn so much to remember when looking for wheels.sigpic
1992 Chevy Camaro 25th Anniversary-SOLD
1992 Chevy Camaro 25th Anniversary
1997 Chevrolet Corvette
The Original
Originally posted by meissenI actually agree with Darren on everything he said...Originally posted by 81DaytonaPaceCarYep, pretty much...not too often I agree 100% with Darren, but there it is...
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Id get chrome 18" irocs if i had your car. I loved how seans car used to look with those.-Joel
1995 Z28 M6 - AI226/234 - autocross ricer
1984 Scottsdale K10 - 305/4bbl/4spd

WTB List:Midwest Chasis DS Loop
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I am just not sure I am going to like 18's on my car, wish I could somehow see that in person. If I found a deal on 18 inch Irocs (used) I would buy them in a heartbeat, but I am not going to spend $1200 on a new set of wheels until I am sure thats what I want
Maybe [MENTION=3597]ruckusz28[/MENTION] can shed some light on this. Your new wheels are 18's right? Where did you get them?sigpic
1992 Chevy Camaro 25th Anniversary-SOLD
1992 Chevy Camaro 25th Anniversary
1997 Chevrolet Corvette
The Original
Originally posted by meissenI actually agree with Darren on everything he said...Originally posted by 81DaytonaPaceCarYep, pretty much...not too often I agree 100% with Darren, but there it is...
Comment
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Post Slut
- December 9th, 2011
- 5919
- Michael H
- 1989 Iroc-Z Convertible/1998 Z28
- Lowell, MI
- Meat Processor
- Send PM
Plus, if you're going with LS1 brakes, you need to factor in the rotor hat thickness!
They add about .3"
I'm running 2" spacers in the rear and 1.5" in the front on 18x9 wheels with +50 offset, LS1 front LT1 rear brakes. Wheels are closer to the fenders, might drop down to 1.5" rear spacers and 1.25" fronts.
1998 Camaro Z28 - Bright Red, 6.0 TR224, 4l60e, 3.42 Eaton TrueTrac
1989 Camaro IROC-Z Convertible - 355 big tube TPI, WC T5, 3.42 Zexel Torsen, CTS-V/C4 brakes
1955 Bel Air 2 Door Post - 357 TPI, Muncie M20, 4 wheel disc
2006 Saab 9-7x 5.3i Daily Driver
Comment
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I am running LS1 brakes in the front, will this seriously affect my wheel choice?Originally posted by hoogiesngrinderz View PostPlus, if you're going with LS1 brakes, you need to factor in the rotor hat thickness!
They add about .3"
I'm running 2" spacers in the rear and 1.5" in the front on 18x9 wheels with +50 offset, LS1 front LT1 rear brakes. Wheels are closer to the fenders, might drop down to 1.5" rear spacers and 1.25" fronts.
I am trying to stay away from spacers/adapters if all possible... If I was going to run spacers I would just pick up some 4th gen Zr1's I mean I can get polished ones with tires for $1100 shipped to my door from OE wheels...
sigpic
1992 Chevy Camaro 25th Anniversary-SOLD
1992 Chevy Camaro 25th Anniversary
1997 Chevrolet Corvette
The Original
Originally posted by meissenI actually agree with Darren on everything he said...Originally posted by 81DaytonaPaceCarYep, pretty much...not too often I agree 100% with Darren, but there it is...
Comment
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Post Slut
- December 9th, 2011
- 5919
- Michael H
- 1989 Iroc-Z Convertible/1998 Z28
- Lowell, MI
- Meat Processor
- Send PM
Not if you run stock offset or factor in the additional wheel width. In my case, since I like the flush look better, not factoring in LS1 brakes would have put my front tires into the fender if I ran the 2" spacer like everyone says to use
Edit: I'll go take some pictures for reference. You'll be able to see how much wiggle room you actually have if you don't push the limits.
1998 Camaro Z28 - Bright Red, 6.0 TR224, 4l60e, 3.42 Eaton TrueTrac
1989 Camaro IROC-Z Convertible - 355 big tube TPI, WC T5, 3.42 Zexel Torsen, CTS-V/C4 brakes
1955 Bel Air 2 Door Post - 357 TPI, Muncie M20, 4 wheel disc
2006 Saab 9-7x 5.3i Daily Driver
Comment
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My last car, I ran 4th gen wheels and ran 2 inch spacer in the rear and 1.5 inch in the front... but if I can I want to avoid that... This is starting to look more difficult then I needed. Should have kept my 16 inch irocs,
sigpic
1992 Chevy Camaro 25th Anniversary-SOLD
1992 Chevy Camaro 25th Anniversary
1997 Chevrolet Corvette
The Original
Originally posted by meissenI actually agree with Darren on everything he said...Originally posted by 81DaytonaPaceCarYep, pretty much...not too often I agree 100% with Darren, but there it is...
Comment
-
Post Slut
- December 9th, 2011
- 5919
- Michael H
- 1989 Iroc-Z Convertible/1998 Z28
- Lowell, MI
- Meat Processor
- Send PM
IMAG0015.jpg
IMAG0016.jpg
Front: 1.5" spacer plus ~.3" LS1 rotor hat = ~1.8" spacing
Rear: 2.0" spacer, difference between drum hat and LT1 rotor is minimal = ~2.1"
18x9 with 50mm offset, so roughly a 7" back spacing
1998 Camaro Z28 - Bright Red, 6.0 TR224, 4l60e, 3.42 Eaton TrueTrac
1989 Camaro IROC-Z Convertible - 355 big tube TPI, WC T5, 3.42 Zexel Torsen, CTS-V/C4 brakes
1955 Bel Air 2 Door Post - 357 TPI, Muncie M20, 4 wheel disc
2006 Saab 9-7x 5.3i Daily Driver
Comment
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You have 18's on your car? Always thought those were 17's for some reason, got a side picture of the car with them on?sigpic
1992 Chevy Camaro 25th Anniversary-SOLD
1992 Chevy Camaro 25th Anniversary
1997 Chevrolet Corvette
The Original
Originally posted by meissenI actually agree with Darren on everything he said...Originally posted by 81DaytonaPaceCarYep, pretty much...not too often I agree 100% with Darren, but there it is...
Comment
-
Post Slut
- December 9th, 2011
- 5919
- Michael H
- 1989 Iroc-Z Convertible/1998 Z28
- Lowell, MI
- Meat Processor
- Send PM
The car is on its fifth or sixth set of wheels
Saleen replicas with 4.75 bp, these are the ones I picked up a while back for $150...I believe you passed on them and bought the Fitti's off me the same day I bought them
564898_10100876657029202_568575806_n.jpg
1998 Camaro Z28 - Bright Red, 6.0 TR224, 4l60e, 3.42 Eaton TrueTrac
1989 Camaro IROC-Z Convertible - 355 big tube TPI, WC T5, 3.42 Zexel Torsen, CTS-V/C4 brakes
1955 Bel Air 2 Door Post - 357 TPI, Muncie M20, 4 wheel disc
2006 Saab 9-7x 5.3i Daily Driver
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