But those tires are never used for more than one race.  Frequently pit crews change tires several times during a 500 mile race.

Chuck

In a message dated Mon, 7 Oct 2002 12:06:26 PM Eastern Standard Time, LISTSERV@GERRY.VANAGON.COM writes:

> Date:    Mon, 7 Oct 2002 10:40:02 -0400
> From:    "G.M.Bulley" <gmbulley@BULLEY-HEWLETT.COM>
> Subject: High-speed Tires, (was Porsches' stupid uninventive vehicle (SUV))
>
> "However no tire will handle 168mph sppeeds (sic) for long without
> cooking the rubber; the technology for really high-speed street tires
> doesn't exist yet."
> >>>>>>>>>
>
> WHAT?
> Better check your coffee; I think some wiseacre switched it to Dark
> Sparkling Folgers's crystals.
>
> If high speed tires "don't exist", explain the black things attached to
> the wheels at IMSA races (national Gran Prix, 24 hours @ Le Mans)? Or at
> the Indy 500? Or at every rebel-flagged NASCAR race?
>
> Same technology as the flying sleigh that comes around once a year?
>
> These racers routinely hit 180 mph for hours, and are at times in the
> 200+ mph range. Tires were not the limiting factor when
> NASCAR limited
> carburetion to reduce speeds that were creeping up to 230.
>
> Bringing your ideas to life,
>
> G. Matthew Bulley
> Bulley-Hewlett