68 Camaro Tire Size Question 235 vs 225 on Front - Team Camaro Tech
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post #1 of 27 (permalink) Old Feb 9th, 19, 05:35 PM Thread Starter
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Lee
 
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68 Camaro Tire Size Question 235 vs 225 on Front

I have a 68 Camaro with standard front suspension and shocks.

I have a set of 15" rims that have a 4.25" backspace.

For the front, I was considering putting 235/60-15 tires on the rims but one of the board members thought that might cause some rubbing issues and it would be best to run 225/60-15 instead.

Is anyone running the 235/60-15 tires and are you having rubbing issues??

Thanks a ton
Lee

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post #2 of 27 (permalink) Old Feb 9th, 19, 06:12 PM
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Mike
 
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Re: 68 Camaro Tire Size Question 235 vs 225 on Front

If you've done a search, you've probably found results are mixed. I rubbed with 235s (on 15X7 with 4.25" BS) on the outer lip after converting to front discs which pushed my tires out another 1/4". When the time came for new tires, I went with 225s and now have no rub. I'm running Moog 6308 springs up front. Pics in my garage.

Hope this helps...Mike.
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post #3 of 27 (permalink) Old Feb 9th, 19, 06:19 PM
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Re: 68 Camaro Tire Size Question 235 vs 225 on Front

The difference is so small that any rubbing could be fixed by adding a little negative camber.

Don

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1969 Camaro vert LS3 4L65E Ridetech level 2 - sold
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post #4 of 27 (permalink) Old Feb 9th, 19, 06:24 PM
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Garth
 
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Re: 68 Camaro Tire Size Question 235 vs 225 on Front

That's the deal, it's such a borderline fit, what works on one car may not on another...

anonymous member

  • '68 RS, AA, 749, L30, M(uncie)20 (originally a 3spd), 15yr backburner resto........
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post #5 of 27 (permalink) Old Feb 9th, 19, 06:34 PM Thread Starter
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Lee
 
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Re: 68 Camaro Tire Size Question 235 vs 225 on Front

Thankyou guys for the responses.

Lee

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post #6 of 27 (permalink) Old Feb 9th, 19, 06:37 PM
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Re: 68 Camaro Tire Size Question 235 vs 225 on Front

It is less than a quarter of an inch. A little skooch of negative camber will move it enough. Donít sweat it....

Don

1969 Camaro LSA 6L90E AME subframe and IRS
1969 Camaro vert LS3 4L65E Ridetech level 2 - sold
1959 El Camino project
1969 Mustang Sportsroof project
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post #7 of 27 (permalink) Old Feb 9th, 19, 09:53 PM
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Re: 68 Camaro Tire Size Question 235 vs 225 on Front

T/A's are 1/2" taller and 1/2" wider (235/60 vs 225/60). https://tiresize.com/tires/BFGoodrich/Radial-TA.htm

  • '68 RS, AA, 749, L30, M(uncie)20 (originally a 3spd), 15yr backburner resto........
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post #8 of 27 (permalink) Old Feb 9th, 19, 10:21 PM
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Re: 68 Camaro Tire Size Question 235 vs 225 on Front

I had problems with 235/60-15's rubbing on the right front in my '67 when I drove over dips in the road. Having a passenger in the front aggravated the problem.

Squaring up the subframe helped a little but adding more positive caster solved the problem 100%. The car also tracks better with the extra caster. I kept the camber at 0į.
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post #9 of 27 (permalink) Old Feb 10th, 19, 04:51 AM
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Re: 68 Camaro Tire Size Question 235 vs 225 on Front

Quote:
Originally Posted by Garfields Maro View Post
T/A's are 1/2" taller and 1/2" wider (235/60 vs 225/60). https://tiresize.com/tires/BFGoodrich/Radial-TA.htm
The increased width is split between the two sides of the wheel, hence a quarter inch wider to the fender. Same with the height, only a quarter inch above the spindle. The other quarter inch becomes increased ride height....

A skooch of negative camber and it will clear if the 225 clears.

Iíve run 255 tires on the factory subframe with no rubbing and there are guys running 265 and 275 tires. All it takes is a little determination and a basic understanding of front end alignments specs. Radial tires should not be using the original factory alignment specs anyway....

With an Art Morrison subframe I run a 295 front tire on my 69. There are guys running 315.

Don

1969 Camaro LSA 6L90E AME subframe and IRS
1969 Camaro vert LS3 4L65E Ridetech level 2 - sold
1959 El Camino project
1969 Mustang Sportsroof project
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Last edited by dhutton; Feb 10th, 19 at 07:27 AM.
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post #10 of 27 (permalink) Old Feb 10th, 19, 08:33 AM Thread Starter
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Lee
 
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Re: 68 Camaro Tire Size Question 235 vs 225 on Front

Boy HOwdy,,,,,,,,,,,,Great info.
You guys are awesome.
Have a great rest of the weekend

Lee

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post #11 of 27 (permalink) Old Feb 10th, 19, 04:18 PM
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Re: 68 Camaro Tire Size Question 235 vs 225 on Front

Quote:
Originally Posted by dhutton View Post
The increased width is split between the two sides of the wheel, hence a quarter inch wider to the fender. Same with the height, only a quarter inch above the spindle. The other quarter inch becomes increased ride height....

A skooch of negative camber and it will clear if the 225 clears.

Iíve run 255 tires on the factory subframe with no rubbing and there are guys running 265 and 275 tires. All it takes is a little determination and a basic understanding of front end alignments specs. Radial tires should not be using the original factory alignment specs anyway....

With an Art Morrison subframe I run a 295 front tire on my 69. There are guys running 315.

Don
I understand where the 1/4" comes from, BOTH height and width. Just wanted to make sure everyone is aware of the dimension differences.

Should also point out that 67/8 is much different than 69 in terms of the maximum size tire that will fit without modification.

That's all I got to say....Good luck !

  • '68 RS, AA, 749, L30, M(uncie)20 (originally a 3spd), 15yr backburner resto........
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post #12 of 27 (permalink) Old Feb 13th, 19, 05:11 PM
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Re: 68 Camaro Tire Size Question 235 vs 225 on Front

I got Cooper Cobra RWL 215/65R15s on my 68.
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post #13 of 27 (permalink) Old Feb 15th, 19, 06:43 AM
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Re: 68 Camaro Tire Size Question 235 vs 225 on Front

I have 225/70/14 on one 69 and 235/70/15 on another. Both look too big for the car sitting on stock suspension. Another 69 has 225/15/60 and 235/15/60 on 8" rallys and like those the best. Another 69 has 235/45/17 and 255/45/17 on 8" wheels, stock height on the tire/wheel combo with the stock lowered look. Guys seem to always try to go bigger and it can spoil the great looks of these cars and have rubbing issues etc. I like more of the stock look and the stock height, which looks like 2" lowered!! Just an old guy talkin.
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post #14 of 27 (permalink) Old Feb 15th, 19, 04:37 PM
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Re: 68 Camaro Tire Size Question 235 vs 225 on Front

I have 235/60-15s on 4.5" backspace on my '67. The slightest and I really mean slightest rubbing is the tire just kisses the front subframe at full turn, just buffs the dirt off and can see fresh steel on the subframe. No other issues. Remember, I'm running 15 x 8 Weld Pro Stars with 4.5" backspace.

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post #15 of 27 (permalink) Old Feb 15th, 19, 06:46 PM
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Re: 68 Camaro Tire Size Question 235 vs 225 on Front

You know if you have stock bolts for the fender to fender well the rubbing could be just the bolt head. Swap a button head bolt and it might fix it.

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