| 摘要 |
<p>Disclosed is a rubber composition for side rubbers, which has good workability and reduced hysteresis loss without decreasing durability of side rubbers. Specifically disclosed is a rubber composition for side rubbers, which is obtained by blending 35-55 parts by mass of a filler containing a carbon black of at least FEF-grade per 100 parts by mass of a rubber component which is composed of at least one of a natural rubber and a synthetic polyisoprene rubber, and another synthetic diene rubber. This rubber composition for side rubbers is characterized in that the blending amount of the carbon black of at least FEF-grade is 15-55 parts by mass, and tan d and the total blending amount of the filler at 25°C satisfy the following formula (I). tan d / (total blending amount of filler) = 0.0025 (I)</p> |
