Date:         Mon, 7 Oct 2002 10:34:40 -0500
Reply-To:     Stan Wilder <wilden1@JUNO.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Stan Wilder <wilden1@JUNO.COM>
Subject:      Re: Porsche's SUV
Comments: To: voicebox@DNAI.COM
Content-Type: text/plain; charset=us-ascii

softer compound...
----------------- clip -----------------
That is exactly it.
They are made of softer compound that gets gummy just like the NASCAR and
INDY tires.
I used to buy race take off tires for about $50.00 the set of 4 from
NASCAR folks I knew. They last less than 10K miles on normal street
driving at low speeds.
I recall the Land Speed Record pursuits and they all had special tires
............. admittedly they were shooting for 400 mph but there was
always a lot of test runs made on lesser quality and lesser priced tires.
When you go to a pure JET it isn't carbs holding you back its just tires
and the loss of gravity that keep you below 800 mph on land.

Stan


On Mon, 7 Oct 2002 07:52:29 -0700 DaveC <voicebox@DNAI.COM> writes:
> >In visiting with a tire dealer he disclosed that the wide low
> profile
> >tires that are on many high performance BMWs, Porsche have a life
> span of
> >only 12 to 15 thousand miles because they get gummy at high speed
> and
> >just use themselves up.
>
> All tires used at this "high speed" would degrade equally, I'd
> think.
> Low-profile tires will turn the same rpm at the same speed as a
> higher-profile tire, for the same application (ie, same outside
> diameter). I don't see why these "high-performance" tires would
> wear
> faster, unless of course they're made of a softer compound...
>
> Dave
> --
> Dave Carpenter
>
> "Any sufficiently advanced technology is indistinguishable from
> magic." -- Arthur C. Clarke
>
>

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