Round Black Donuts, or in Other Words, Tires Part 2 Bob White ...

of gravity and front axle are determined during manufacture. Thus, an auto-x/super tire
set with front tires having 375 lbf/deg of cornering force compared to just a good tire
with 275 lbf./deg. results in about a 36% increase in the rate of vehicle initial response.
This article is about tires and how they come to be selected for your car. However, how
the tires effect the vehicles response and feel also depends on the properties of those
tires.That is why the driving tests by both the tire and car manufacturer are so important
to the feel that are associated with Porsche or Corvette or Mercedes-Benz and Lexus. So
lets hear it for the engineers, expert drivers, and their companies that understand the
importance of that feel to their customers.
A final note on a related but some what different aspect of tires. Earlier it was pointed
out that the average car owner only has a flat tire on average every 60,000 miles. In some
countries, Germany for example, a tire may not be repaired, no plugs for a nail in a tire.
The tire must be replaced regardless of whether it has been driven 10 or 100 or 10,000
miles. The figure below is a photograph of the inside of a tire that has had a nail hole
repaired with a plug. There is an almost one inch high by one quarter inch in diameter
piece of the rubbery filament used for the plug sticking out of the carcass of the tire.
Figure no. 11 An Inside view of a Plugged Tire
It is about as resilient as a piece of hot dog although stronger. So when you are driving it
is bent by the centrifugal force and flops around every time the brakes are applied,
steering inputs change the car’s direction or bumps or tar strips flex the tire. Think about
that the ext time you are going over the speed limit with a tire on your car that has a plug