Re: Did the very old tires warp?

[cse...@mts.net]

The tire is a bias ply that ran in the 50s to early 60s. Touch the
side on both side of the bulge and then the bulge. Feel the same?
Most likely sidewall separation between the plies as in a bubble or
maybe the cords have weakening and streatched. This was not a big
problem back then, but these tires were supposed be worn out 30 -40
yrs ago.

P

On Thu, 01 Sep 2011 04:00:41 -0500, j...@myplace.com wrote:

>This question is mostly for you really old guys on here.
>
>I bought an old piece of farm equipment (hay wagon) with one of the
>tires being an old 8.00 x 15 tire. (the other 3 tires were modern
>tires). Anyhow, I cant imagine how old this 8.00 x 15 tires is, but I
>know it probably goes back to the 50's or 60's. (I'm not exactly
>young myself). I recall in the 70's they were using an alphabetic
>character at the beginning, such as G78 15. Then in the 80's they
>began using something with a P at the beginning such as P225 75 R15
>(and those were steel belted radials).
>
>Amyhow, this old 8.00 x 15 tire still holds air, and is not badly
>cracked, and still has half it's tread. But that tire was wobbling
>and I had a friend drive behind it and he said the rim must be bent.
>I jacked up that wheel, and put a carpenter square on the ground and
>spun the tire. I bet it deflected 1" on one side of the tire. In
>other words one side of the tire touched the square and the other side
>there was a 1" gap, or possibly even 1 - 1/4". Then I only watched
>the rim, and saw that it was the same all the way around.
>
>Therefore the problem is the tire itself. I have seen the modern
>steel belted radials get belt separation and a big bubble in the tread
>area, and those old shortened letter ones such as H78 x 15 also got
>bubbles, both on the tread surface and the sidewalls. But I have
>never seen a whole tire warp to the side where the sidewall is shifted
>an inch or more, so the sidewall on part of the tire is an inch or
>more closer to myself than the other part of the tire.
>
>Was this a common problem on those really old tires? Is there a name
>for this defect?
>
>Thanks
>

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