I've never been lucky enough to get over to Germany and experience the
Autobahn but I'm told that 140 mph speeds aren't uncommon there.
I've been told the same about speeds on some highways in the Arab
nations.
My Friend John, sells used but not flyable aircraft tires. He gets new
defects from Goodyear and used tires from many sources.
Although most aircraft tires are very rigidly produced there are very few
aircraft that have landing speeds over 125 mph (open to correction on
this).
What would incite any auto company to produce a car with high speed
potential when they know that the car could never be driven at that speed
?
Tires self destructing at speeds over 80 mph give very little warning
before they totally disintegrate.
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.

Stan Wilder

 However no tire will  handle 168mph sppeeds for long without cooking the
rubber; the
> technology for really high-speed street tires doesn't exist yet.
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