| 摘要 |
PURPOSE:To optimize input dependency of compounded rubber and tire aspect ratio and thereby improve wear resistance, by forming a tread by a rubber composition compounding a specific reinforcing agent in a specific rate into a specific rubber, and setting the aspect ration within a specific range. CONSTITUTION:The tire is provided with a tread portion, a pair of side portions formed at both shoulders of the tread portion, and a pair of head portions formed at the inner circumference of the side portions. The tire is reinforce by a carcass and a belt. The tire is formed by a rubber composition compounding 40-100 parts by weight of a silicate filler or a mixture of the filler and a reinforcing carbon black as a reinforcing agent with respect to 100 parts by weight of a styrene-butadiene rubber of a compound of 50 parts by weight of natural rubber or polybutadiene rubber into the styrene-butadiene rubber. Further, an aspect ratio of the tread (sectional height / sectional width X100) is set within a range of 50-65%. |
