PNEUMATIC TIRE HAVING DUAL LAYER TREAD

摘要

PROBLEM TO BE SOLVED: To provide a pneumatic tire having a dual layer tread.

SOLUTION: A pneumatic tire includes a carcass and a tread located radially outward of the carcass and extending between sidewalls. The tread provides a tread running surface and includes 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 and the second rubber compound are different. 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. Each of the first rubber compound and the second rubber compound includes 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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