| 摘要 |
PURPOSE: A low noise tire restrains the generation of noise by improving a semi lug groove formed on a center block. CONSTITUTION: A protruded wall(6) blocking one side of a semi groove(5) is formed on the semi groove(5) formed on a center block(2). The protruded wall(6) is formed near the center of a tire. The length(L1) of the protruded wall(6) is formed in a predetermined range of the length(L) of the semi groove(5). Thus, the rigidity of the center block(2) is reinforced by the protruded wall(6). Therefore, the rigidities of the center block(2) and a shoulder block(3) forms a balance, thereby restraining a noise generated from a tread.
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