| 摘要 |
<p>This invention relates to a pneumatic tire in which an appearance during a final stage of running is good and a heat buildup is low, and more particularly to a pneumatic tire comprising a tread portion (3) having a cap rubber (8) and a base rubber (7), characterized in that a rubber composition comprising not less than 30 parts by mass of carbon black and not less than 2 parts by mass of silica based on 100 parts by mass of a rubber component is used in the base rubber (7), and the base rubber (7) has a tensile stress at 300% elongation (M 300 ) of 10-14 MPa and a loss tangent (tan ´) of 0.1 or lower.</p> |
