RE: IML: Tire expiration ?Radial vs. Bias Ply

["Dick Benjamin" <dickb@xxxxxxxxx>]

Tires with Nylon cords will develop flat spots from sitting in one place.
Fortunately, these will smooth out in a few miles of driving, unless the
temperature is really low.   Nylon cords were used in bias ply tires in the
late 60's and through the 70s; there may still be a few around on collector
cars.

Almost all "Radial" tires use steel belts under the tread; these don't take
a "set", but they can certainly fail.  

The more common failure in a radial, though, is a ply separation, in which
an area of the tread rubber takes leave of the casing, causing a bump each
time the wheel goes around, and ultimately the complete failure of the tire
when it loses a patch of tread rubber.  Often this happens without losing
air from the tire, in which case you can limp to the next offramp before
changing the tire.

If you are feeling or hearing a bump or slapping noise as you drive down the
road, you have a tire that is about to lose a chunk of tread.  Have someone
ride alongside you and listen to determine which tire it is, and get rid of
it fast!

Out here on the 85 MPH freeways, I hear cars and trucks come by me all the
time with a bad tire making the noise - I quickly get away from that vehicle
- it is about to have an exciting event and I don?t want to be there!

Dick Benjamin

-----Original Message-----
From: mailing-list-owner@xxxxxxxxxxxxxxxx
[mailto:mailing-list-owner@xxxxxxxxxxxxxxxx] On Behalf Of RandalPark@xxxxxxx
Sent: Friday, June 03, 2005 5:56 AM
To: mailing-list@xxxxxxxxxxxxxxxx
Subject: Re: IML: Tire expiration ?Radial vs. Bias Ply

I have noticed that my old bias ply tires develop flat spots. If the cars
are driven frequently, these usually smooth out. If they sit for longer
periods, they don't.

I think that the longevity of either style of tire is going to depend on the
amount of quality put into the product. Poor quality will result in faster
deterioration from age and use in either case.

My Imperials do the best all around with high quality radial tires.

Paul W.

In an email dated 3/6/2005 1:11:22 pm GMT Daylight time,
Black55Imperial@xxxxxxx writes:

>I have original type bias ply tires on my 3 Imperials and have had ?great 
>service with no cracking or lumps beyond the 10 years mentioned. ?The ?cars
are 
>stored inside with humidity control and away from sunlight. ? However, the 
>original radial tires on some of my 70s collectible cars with under ?10,000
miles 
>began to give lumpy rides.. ?These cars are not driven at ?highway speeds
and 
>never in winter. ?These radial tires seem to have the ?belts break after
time 
>where bias do not show the same type deterioration. ?
> 
>Have others noticed a difference in the aging properties with raidal vs. ?
>bias ply tires ?
> 
>Randy Still
>black '55 Imperial Sedan
>gray '56 Crown Imperial Limousine
>turquoise '64 Imperial Crown Coupe
>black55imperial@xxxxxxx
>


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