>For you mathematicians out there you need to calculate the expotential
>tire diameter growth at 168 mph along with the fact that the specific
>gravity of 5,000 pounds at 168 mph velocity is reduced to the point that
>a squirrel collision with any tire results in sure death.
>In AA fuel racing our tires grew exponentially and no longer had a bead
>seal to the rims at 200 + mph. It was the liner that kept the tube inside
>the tires. We marked our tires at the valve stems and after a few hard
>passes we changed the tires to be sure that the tube wasn't bunched
>because the tire moved from its designated spot (they always moved) on
>the wheel when it reseated to the rim. Bad reseating was a sure sign that
>the valve stem was going to rip out of the tube and kill a driver along
>with wrecking the car.

It's torque which spins a tire on the wheel. It's not going to happen
on a street car. Not a normal one, anyway. 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.

However as the tire diameter "expands" with speed, this will reduce
fuel-inefficiency ;-)
--
Andrew Grebneff
165 Evans St, Dunedin 9001, New Zealand
<andrew.grebneff@stonebow.otago.ac.nz>
Seashell, Macintosh, VW/Toyota van nut