69' Tire Size - Team Camaro Tech
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post #1 of 14 (permalink) Old Jul 6th, 16, 10:29 AM Thread Starter
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Phil
 
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69' Tire Size

I have a 69 Camaro with factory GM 15" x 7" Rally wheels. I think they have a 4.250" or 4.500" back space, can't remember. Currently I have P215/65R15 on the front and P235/60R15 on the rear. I'm ready to but a new set of tires for my car and want the same size all way around. Can I run 235/60's on the front or will they scrub? If so, what would be the best size tires to buy? This is an original SS/RS 396 car. Any advice would be greatly appreciated. Thanks

Last edited by Bigfish45; Mar 2nd, 17 at 10:24 AM.
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post #2 of 14 (permalink) Old Jul 6th, 16, 12:00 PM
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Re: 69' Tire Size

I have a 68 Camaro standard suspension no drop front end with repro rally 15X7 4"BS wheels, Cooper Cobra 235R15 and have zero rubbing or interference issues.


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post #3 of 14 (permalink) Old Jul 6th, 16, 12:49 PM
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Re: 69' Tire Size

When I bought my '69 it had 15X7 rally wheels and 265/50/15 tires on all 4 corners. I don't remember it rubbing. This was back in 1989 and I changed the wheels and tires in 1990.

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post #4 of 14 (permalink) Old Jul 7th, 16, 09:07 AM
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Re: 69' Tire Size

I have 15X8 1972 Corvette Rally wheels with 235/60/15 on the front and have no problems. Suspension is basically stock but maybe stiffer, KYB shocks, 1 1/8' swaybar and Moog springs.

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post #5 of 14 (permalink) Old Jul 7th, 16, 09:33 AM
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Re: 69' Tire Size

I have 15 x 7.5" w/ 3.75" bs. It's rubbing the front with 245/60R15. I'm going to have to do something about it. I'm not sure if changing the bs would help or not with mine.




'69 SS396 X66 L34 08D (8/22/1969) M21 BS
460ci Gen VI 9.75:1
241/249 @ .050" .625/.625 110 LSA

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post #6 of 14 (permalink) Old Jul 7th, 16, 08:26 PM
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Re: 69' Tire Size

Quote:
Originally Posted by HawkX66 View Post
I have 15 x 7.5" w/ 3.75" bs. It's rubbing the front with 245/60R15. I'm going to have to do something about it. I'm not sure if changing the bs would help or not with mine.





3.5 backspace won't work with anything with meat on it. 4.5 backspace is needed to run a tire like that. I have 15 x 8 with 4.5 backspace, 1 inch drop springs and don't rub with 245/60 R15 on the front
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post #7 of 14 (permalink) Old Jul 8th, 16, 04:57 AM
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Re: 69' Tire Size

Quote:
Originally Posted by onefiness View Post
3.5 backspace won't work with anything with meat on it. 4.5 backspace is needed to run a tire like that. I have 15 x 8 with 4.5 backspace, 1 inch drop springs and don't rub with 245/60 R15 on the front
Good to know. I knew 3.75 bs is too much, but I'm glad to know 4.5 will work. Now to find some ET IV wheels in 4.5 bs. Probably not going to happen...

'69 SS396 X66 L34 08D (8/22/1969) M21 BS
460ci Gen VI 9.75:1
241/249 @ .050" .625/.625 110 LSA

Semper Fi!

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post #8 of 14 (permalink) Old Jul 8th, 16, 05:00 AM
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Re: 69' Tire Size

Why don't you just put your rear rims on the front and check it.
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post #9 of 14 (permalink) Old Jul 8th, 16, 05:12 AM
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Re: 69' Tire Size

Quote:
Originally Posted by CarAddict View Post
Why don't you just put your rear rims on the front and check it.
All four of my wheels are identical. When I'm ready to mess around with it, I'll start another post. I don't want to step on the OPs.

'69 SS396 X66 L34 08D (8/22/1969) M21 BS
460ci Gen VI 9.75:1
241/249 @ .050" .625/.625 110 LSA

Semper Fi!

"The galleries are full of critics. They play no ball, they fight no fights. They make no mistakes because they attempt nothing."
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post #10 of 14 (permalink) Old Jul 8th, 16, 08:50 AM
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Re: 69' Tire Size

Quote:
Originally Posted by HawkX66 View Post
I have 15 x 7.5" w/ 3.75" bs. It's rubbing the front with 245/60R15. I'm going to have to do something about it. I'm not sure if changing the bs would help or not with mine.
If I understand this correctly your 7 inch wide wheel is centered on the hub (7.5/2+3.75) so 3.75 inside the hub 3.75 outside.

Quote:
Originally Posted by onefiness View Post
3.5 backspace won't work with anything with meat on it. 4.5 backspace is needed to run a tire like that. I have 15 x 8 with 4.5 backspace, 1 inch drop springs and don't rub with 245/60 R15 on the front
8 in wide with 4,5 back space you have 3.5 inches outside the hub. If you have not put button head bolts in for clearance we are talking about a 1/4 inch difference here. I think that is what I would look at first if it was mine, the button head bolts instead of hex head.

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post #11 of 14 (permalink) Old Jul 8th, 16, 09:39 AM
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Dave
 
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Re: 69' Tire Size

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Originally Posted by yellow69RS View Post
If I understand this correctly your 7 inch wide wheel is centered on the hub (7.5/2+3.75) so 3.75 inside the hub 3.75 outside.

8 in wide with 4,5 back space you have 3.5 inches outside the hub. If you have not put button head bolts in for clearance we are talking about a 1/4 inch difference here. I think that is what I would look at first if it was mine, the button head bolts instead of hex head.

Jeff
Your measurements seem right Jeff. Where I'm hitting is on the center back of the wheel well with the edge of the outer side of the tread of the tire. I haven't looked at it closely yet, but my nose isn't lined up perfectly yet. There's a chance a tweak here and there might help me out. I actually took the lower wheel well bolts out on each side to take them out of the equation. It may have been rubbing a little on them before, but now it can't and it isn't rubbing on the fender.

'69 SS396 X66 L34 08D (8/22/1969) M21 BS
460ci Gen VI 9.75:1
241/249 @ .050" .625/.625 110 LSA

Semper Fi!

"The galleries are full of critics. They play no ball, they fight no fights. They make no mistakes because they attempt nothing."
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post #12 of 14 (permalink) Old Jul 8th, 16, 10:03 AM
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Red face Re: 69' Tire Size

Quote:
Originally Posted by Bigfish45 View Post
I have a 69 Camaro with factory GM 15" x 7" Rally wheels. I think they have a 4.250" or 4.500" back space, can't remember. Currently I have P215/65R15 on the front and P235/60R15 on the rear. I'm ready to but a new set of tires for my car and want the same size all way around. Can I run 235/60's on the front or will they scrub? If so, what would be the best size tires to buy? This is an original SS/RS 396 car. Any advice would be greatly appreciated. Thanks
Put your rear tires on the front and check clearance. I believe your offset will work; I had the same offset with no problems.

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post #13 of 14 (permalink) Old Jul 10th, 16, 07:46 PM
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Smile Re: 69' Tire Size

I have that same 235/60r15 on rally's all around. 2" drop in front. Unknown drop in rear. No issues anywhere.


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post #14 of 14 (permalink) Old Jul 11th, 16, 05:25 AM
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Re: 69' Tire Size

I run 225 x 60 x15 with no issue and doesn't look too big for the car like a lot of the Camaros look on one of my cars and I run 215 x 70 x 14 on another car with stock rallys.
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