Wheel/tire size for '68 Camaro - Team Camaro Tech
Wheels & Tires What fits what?

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post #1 of 18 (permalink) Old Jan 2nd, 17, 04:11 PM Thread Starter
Brianna
 
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Wheel/tire size for '68 Camaro

Hey guys, I recently bought wheels and tires for my 1968 Camaro and had issues with the front ones rubbing. I have REV classic Chrome 100 18x9 with 255/45/18 on the rear and 18x8 with 255/45/18 on the front and they rubbed in the front pretty bad. Id like to keep 18x8 in the front, but am considering 17x7. I didn't see 18x7 wheels in that brand. The only modifications are disc breaks to the front. Anyone have any suggestions for wheel/tire size?

Thanks!
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post #2 of 18 (permalink) Old Jan 2nd, 17, 04:58 PM
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Re: Wheel/tire size for '68 Camaro

What is the backspacing on your wheels?

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post #3 of 18 (permalink) Old Jan 2nd, 17, 04:59 PM
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Re: Wheel/tire size for '68 Camaro

Some good reading here <-LINK
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post #4 of 18 (permalink) Old Jan 8th, 17, 10:31 PM Thread Starter
Brianna
 
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The back spacing of the 18x8 wheels I have now is 4 1/2 it's the same for the 17x8. If I go 17x7 it would be 4 inches.
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post #5 of 18 (permalink) Old Jan 9th, 17, 04:35 AM
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Re: Wheel/tire size for '68 Camaro

Before you buy new wheels have the front end aligned with -1.0 degrees of camber. Will likely fix your problem.

Don

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post #6 of 18 (permalink) Old Jan 9th, 17, 04:54 AM
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Re: Wheel/tire size for '68 Camaro

255's in the front is pretty darn wide.

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post #7 of 18 (permalink) Old Jan 9th, 17, 06:07 AM
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Re: Wheel/tire size for '68 Camaro

I think the backspacing is the secret and you need a minimum of 4 1/2 and then 255 back & 235 front IMO
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post #8 of 18 (permalink) Old Jan 9th, 17, 06:18 AM
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Re: Wheel/tire size for '68 Camaro

Quote:
Originally Posted by socal_tom View Post
I think the backspacing is the secret and you need a minimum of 4 1/2 and then 255 back & 235 front IMO
Even my 225's rub up front. I'm running 7" wheels with 4.02" back spacing so it's possible the 235 would work with 4.5" BS but you might get rubbing on full clock while turning.

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post #9 of 18 (permalink) Old Jan 9th, 17, 06:59 AM
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Re: Wheel/tire size for '68 Camaro

I am amazed how many people throw away wheels and tires on this site because they won't try negative camber.... It costs nothing to try it....

Don

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1969 Camaro vert LS3 4L65E Ridetech level 2 - sold
1959 El Camino project
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post #10 of 18 (permalink) Old Jan 9th, 17, 01:20 PM
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Re: Wheel/tire size for '68 Camaro

Quote:
Originally Posted by Gbauer View Post
255's in the front is pretty darn wide.
And a 45 series tire on an 18 is very tall up front.


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post #11 of 18 (permalink) Old Jan 9th, 17, 02:30 PM
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Re: Wheel/tire size for '68 Camaro

I run an 8x18" with 4.875" back space 235/35-18" 3" lowering springs on front no problems. 275/35-18" in back on a 9" wheel.

I had 7x17" wheels 4 " back space and a 245/35-17" and it worked fine.

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post #12 of 18 (permalink) Old Jan 9th, 17, 09:41 PM
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Re: Wheel/tire size for '68 Camaro

You mentioned disc brakes up front. Some kits move the wheels out 1/2"+. You may want to check on that. That will require additional backspacing or a hub that moves the wheel back in. The latter option is what I did with a CPP big brake kit.

Quote:
Originally Posted by dhutton View Post
I am amazed how many people throw away wheels and tires on this site because they won't try negative camber.... It costs nothing to try it....

Don
Nothing wrong with that but will not be enough from what I have read on here with an 18X8 wheel up front with 255's

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post #13 of 18 (permalink) Old Jan 10th, 17, 04:40 AM
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Re: Wheel/tire size for '68 Camaro

Quote:
Originally Posted by larryh56 View Post
You mentioned disc brakes up front. Some kits move the wheels out 1/2"+. You may want to check on that. That will require additional backspacing or a hub that moves the wheel back in. The latter option is what I did with a CPP big brake kit.



Nothing wrong with that but will not be enough from what I have read on here with an 18X8 wheel up front with 255's
Did any of those posts that you read include details of the front end alignment, brake offset and ride height etc? They are meaningless without those details...

Don

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1969 Camaro vert LS3 4L65E Ridetech level 2 - sold
1959 El Camino project
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post #14 of 18 (permalink) Old Jan 12th, 17, 05:11 PM
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Re: Wheel/tire size for '68 Camaro

Quote:
Originally Posted by Brees68 View Post
The back spacing of the 18x8 wheels I have now is 4 1/2 it's the same for the 17x8. If I go 17x7 it would be 4 inches.
You don't have enough backspace.

Quote:
Originally Posted by ilikeike View Post
I run an 8x18" with 4.875" back space 235/35-18" 3" lowering springs on front no problems. 275/35-18" in back on a 9" wheel.

I had 7x17" wheels 4 " back space and a 245/35-17" and it worked fine.
I also ran this backspace up front on an 18x8" wheel. Hubs and rotor hats come into play but I would never try an 18x8" wheel with less than 4.75" backspace and highly recommend you do 4.875 minimum. I ran a 245 tire and needed to roll the fender lip and ran a static -1.0* camber. I just kissed the frame with the tire at full lock. If I did my setup over again I would of ran 5" backspace.


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post #15 of 18 (permalink) Old Mar 14th, 17, 04:32 PM
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Re: Wheel/tire size for '68 Camaro

Quote:
Originally Posted by dhutton View Post
I am amazed how many people throw away wheels and tires on this site because they won't try negative camber.... It costs nothing to try it....

Don
How much negative camber can you get with stock control arms? How much will 1 degree of negative camber move in the top of the tire?

Last edited by Last930; Mar 14th, 17 at 04:33 PM. Reason: Addition
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