| 摘要 |
A rubber composition and a pneumatic tire using the composition, the rubber composition comprising at least one type of rubber of a total of 100 pts.wt. and carbon black formed of acetylene of 10 to 100 pts.wt., wherein a heat conductivity is increased to 0.3 kcal/m.h. ° C. or higher to promote a radiation effect; the pneumatic tire using the rubber composition for at least a part of the side wall part of the tire and/or the portion of the head part of the tire coming into contact with at least the tire wheel rim flange of the tire.
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