Pneumatic tire having a dual layer tread
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United States of America Patent
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Apr 9, 2013
Grant Date -
Feb 28, 2013
app pub date -
Aug 31, 2011
filing date -
Aug 31, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
A pneumatic tire comprising a carcass and a tread located radially outward of the carcass and extending between the tire sidewalls is disclosed. The tread provides a tread running surface and comprises a first, radially outer tread layer comprising a first rubber compound and a second, radially inner tread layer comprising a second rubber compound, wherein the second tread layer is located radially adjacent to the first tread layer, and wherein the first rubber compound is different from the second rubber compound. The second tread layer comprises a plurality of integrally formed extensions of the second tread layer extending from the second tread layer radially outwardly to the tread running surface. The first rubber compound and the second rubber compound each comprise at least at least 30 parts per hundred parts of rubber (phr) of silica. Each of the extensions has a width as measured in the axial direction of the tire in a range of from 1 to 15 mm.
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