abstract |
A pneumatic tire having improved fracture resistance while maintaining heat generation, workability, and crack growth resistance. A pneumatic tire using, as a base rubber, a rubber composition containing a modified natural rubber obtained by graft-polymerizing a polar group-containing monomer to natural rubber latex, coagulating and drying. By using a modified natural rubber obtained by graft polymerization of a polar group-containing monomer on natural rubber latex, coagulating and drying as a rubber component, and preferably using a modified butadiene rubber as a butadiene rubber With a natural rubber / butadiene rubber blend having a butadiene rubber ratio that exhibits the crack growth resistance, low heat build-up can be obtained. In this low exothermic property, both the low exothermic property and the fracture resistance can be achieved at a high level by improving the grade of carbon black or replacing part of the carbon black with silica. |