| 摘要 |
PROBLEM TO BE SOLVED: To provide a rubber composition for a tire having improved operation stability and durability compared to the conventional levels while reducing rolling resistance when making a tire by blending a carbon black of which colloidal property is controlled.SOLUTION: A rubber composition for a tire manufactured by blending 100 pts.wt. of a rubber component containing an aromatic vinyl conjugated diene copolymer having a glass transition temperature of less than -40°C of 10 to 100 wt.% and 40 to 100 pts.wt. of a reinforcement filler containing a carbon black of 40 to 85 pts.wt. has a mode diameter Dst in a weight distribution curve of a Stokes diameter of an agglomerate of the carbon black of 145 nm or more, a nitrogen adsorption specific surface area NSA of 45 to 70 m/g, a ratio of the nitrogen adsorption specific surface area NSA to an iodine adsorption amount IA (unit: mg/g), NSA/IA of 1.00 to 1.40. |
