| abstract |
[PROBLEMS] To provide a rubber composition for a tire that improves fuel economy, wet grip performance and wear resistance in a well-balanced manner, and also provides good processability, and a pneumatic tire produced using the rubber composition. To do. A rubber component containing a styrene butadiene rubber having a styrene amount of 20% by mass or more, silica, and a styrene-butadiene block copolymer having a weight average molecular weight Mw of 4 × 10 4 or more, and the rubber component In 100% by mass, the total content of the styrene butadiene rubber and butadiene rubber is 90% by mass or more, and the content of the silica is 5 to 200 parts by mass with respect to 100 parts by mass of the rubber component. The present invention relates to a tire rubber composition having a block copolymer content of 1 to 40 parts by mass. [Selection figure] None |