This invention relates to high performance tires designed for high
vehicular speeds having thin treads with a maximum thickness of about
three centimeters with a running surface which is comprised of a rubber
composition which is highly loaded with a combination of reinforcing
filler and rubber processing oil. The combination of reinforcing filler
is comprised of conductive carbon black and optionally at least one of
classical rubber reinforcing carbon black and precipitated silica and
their mixtures. This high level of a combination of selective reinforcing
filler together with rubber processing oil in the tread rubber is
provided to promote a reduction in internal heat generation within the
thin tread during high vehicular speeds, particularly for vehicles
intended to be used as race cars. The carbon black reinforcement is
provided as being comprised of a conductive carbon black, which may
optionally be combined with a classical rubber reinforcing carbon black,
and which may optionally be combined with an amorphous synthetic silica,
namely a precipitated silica, to aid in providing a path for thermal
conductivity through the thin, high reinforcing filler and rubber
processing oil loaded tire tread to its running surface and thence to the
ground in order to therefore promote a reduction in internal heat build
up within the tread during high speed operation of the tire.