Tire size question

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Jan 24, 2006 | 11:26 AM

fordman71

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Tire size question

I'm sure this has been asked before, but I can't find an answer any where. What is the diameter of the old tire sizes 8.75-16.5 and 9.50-16.5. Thanks

Jan 24, 2006 | 12:04 PM

1975Ford

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For a 16.5 inch tire, or for a specific truck?

Jan 24, 2006 | 12:29 PM

cjstang32

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The wheel diameter(s) are 16.5". The tire diameters are not contained in the sizing info that you supplied. If the size read: 31 x 9.50 x 16.5 then the height (outside diameter) would be approximately 31".

Jan 24, 2006 | 01:01 PM

fordman71

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Quote:

Originally Posted by 1975Ford

For a 16.5 inch tire, or for a specific truck?

I'm asking about tire size. On some old pickup truck brochures, tire sizes are 8.75-16.5 and 9.50-16.5. I was just wondering what the over all diameters are. Thanks

Jan 24, 2006 | 01:11 PM

fordman71

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Quote:

Originally Posted by cjstang32

Thanks, I think the old tires from the '70s were "labeled" (for lack of a better word), differently than today. Is an old 9.50-16.5 tire equal in size to a newer 31x9.50x16.5?

Jan 24, 2006 | 08:09 PM

Renzen

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If I'm not mistaken it seems as though you are mistaking tire sizes for rim sizes. The only time I've ever heard mention sizes like 9.50-16.50 is for rims. 9.50 being the thickness and 16.50 being the height or diameter.

Jan 24, 2006 | 08:13 PM

havi

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tires manufactured back then had only the 9.5 16.5 on them. It was a 31 inch tire with 9.5 width and 16.5 wheel dia. I just got rid of a few of them. They were bias ply too.

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Jan 25, 2006 | 12:19 AM

Torque1st

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You can find old tire sizes at:
http://www.coker.com/
Just find the tire size in the search box and check the details.

The 9.5 x 16.5 was 31" in diameter.

I am old enuf to have mounted those old bias ply tires new on rims...

Last edited by Torque1st; Jan 25, 2006 at 12:24 AM.

Jan 25, 2006 | 05:47 AM

#10

Renzen

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That's why I was mistaking him for talking about rims. Because he didn't mention a height in his question. I didn't realize that they used those numbers for tire sizes back then. Sorry I'm a bit young and don't remember how they sized them back then. My 76 is 2 years older than me. I appreciate the correction though. Always learn something new on this site.

Jan 25, 2006 | 09:51 AM

#11

fordman71

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Thanks guys for all the input and information. Like Renzen said, I am too young to know the old tire sizes also. I'm going to check out the coker tire website.