Base-cap tread
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United States of America Patent
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Apr 5, 1988
Grant Date -
N/A
app pub date -
Dec 5, 1985
filing date -
Dec 5, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A pneumatic tire having a tread of a lug type pattern is disclosed. In this type of the tire, the tread rubber has a composite structure of a cap rubber and a base rubber having a heat build-up property lower than that of the cap rubber and arranged on at least a shoulder portion of the tread just beneath the cap rubber. The base rubber has a thickness that an average thickness just beneath the lug is larger than that just beneath the lug groove in a conical plane imaged by taking as a general line a normal line drawn from the tread end to the inner surface of the tire in the radial section inclusive of a rotational axis of the tire.
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