1969 Front Tire Size - Team Camaro Tech
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post #1 of 5 (permalink) Old Aug 26th, 12, 09:04 AM Thread Starter
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craig
 
Join Date: Aug 2012
Location: San Diego
Posts: 6
1969 Front Tire Size

I am running 275-60/15s on the rear on stock 7" rims. IMO, the 8" look funny. These are the largest tires that will fit. I have 215-65/15s on the front with 7" and can't decide whether to go to 225-60 or 235-60. Does anyone have recommendations? The 235-60 is the same height as the 215-65 and I really like the ride height. If I go to the 225-60s, it will be 3/4 inch lower.

Here is a pic of how it looks now:

http://i1063.photobucket.com/albums/...r/ce5ee26a.jpg


Any input? Thanks.
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post #2 of 5 (permalink) Old Aug 26th, 12, 02:04 PM
Joe
 
Join Date: Jul 2012
Location: ny
Posts: 19
Re: 1969 Front Tire Size

I just put on 235-60-15s on 15x7s front
and 255-60-15s on 15x8s in the rears
heres a pic


1969 SS 468 built by Jack Merkel Racing Engines of Hauppauge, NY
Turbo 400 with reverse valve body by Staria's Racing Transmissions of Centereach, NY
Ford 9 inch 389 gears
4 wheel disc brakes
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post #3 of 5 (permalink) Old Aug 27th, 12, 06:37 PM
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Lynn
 
Join Date: Dec 2004
Location: Oklahoma City
Posts: 3,086
Re: 1969 Front Tire Size

Not sure how you came up with 3/4 inch difference. The 215 65 15 is 26 inches tall. The 225 60 15 is 25.62 inches tall. Difference is .38 inch. The difference from the middle of the spindle to the ground is only half that or .19 inch, so less than a 1/4 inch difference in ride height in the front. I think it would sit real sweet with that combo.

Here is how to figure tire height.

section width x aspect ratio (expressed as .60 for a 60 series, .70 for a 70 series) x 2

divide by 25.4

add that number to your wheel diameter and it gives you the overall diameter for the tire.

Mind you, this assumes the manufacturer is dead on with their specs. They usually are not. A 235 tire might be 233.5 mm wide, but will be rounded up to the nearest "5".

So...

215 x .65 x 2 = 279.5
divide by 25.4 = 11.0039370078 (I rounded to 11 for your tire height).
add 11 and 15 = 26

Run the same calculation for the 225 60 and you will get 10.6299212598 (actually closer to 10.63, but just to be safe, I rounded down to 10.62 which gives an overall diameter of 25.62

If you don't want to round, the difference in the two is .374015748, with the corresponding difference in ride height .187007874. Still less than two tenths of an inch.

hope that helps.

BTW, you guys have some sweet looking blue Camaros.

Lynn
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post #4 of 5 (permalink) Old Aug 28th, 12, 08:36 AM Thread Starter
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craig
 
Join Date: Aug 2012
Location: San Diego
Posts: 6
Re: 1969 Front Tire Size

Thanks Lynn. You are right. I used the discount tire calulator and it came out with exactly what you came up with. Not sure what I did previously. I am still leaning towards the 235's. Thanks for the compliments also.
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post #5 of 5 (permalink) Old Aug 28th, 12, 10:12 AM
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Guess
 
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Join Date: Jan 2001
Location: New Taxes York
Posts: 15,364
Re: 1969 Front Tire Size

My 235\60-15 Radial T\A's measure 25.75". I have them all the way around on 7" rims and think they look good. I don't have any rubbing problems in front, even though it's lowered.

https://www.camaros.net/forums/attach...0&d=1280520135
Wish it was a better picture of the front.

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