Luftfylt helårsdekk

摘要

A pneumatic tire has a tread composed of a rubber composition which includes a rubber component and particulates of a crystalline syndiotactic-1,2-polybutadiene resin. The particulates have an average particle diameter of 10 to 500 mu m, and the melting point of said crystalline syndiotactic-1,2-polybutadiene resin is not less than 110 DEG C. The compounding ratio of the resin is 5 to 60 parts by weight relative to 100 parts by weight of the rubber composition. A matrix portion of the tread rubber other than the above particulates is preferably a foamed rubber. The particulates may be resin-composite particulates composed of the crystalline syndiotactic-1,2-polybutadiene resin having a melting point of not less than 110 DEG C and a carbon black, wherein the compounding ratio of the resin-composite particulates is 5 to 60 parts by weight relative to 100 parts by weight of the rubber component, and the resin and the carbon black satisfy the following inequalities: 250 X + 10 Y 1300 in which X is nitrogen-adsorption specific surface area (unit: m2g) and Y is compounding ratio of the carbon black (parts by weight) relative to 100 parts by weight of the resin.