| 摘要 |
PROBLEM TO BE SOLVED: To provide a tread rubber composition which is useful for tire treads, can enhance both the gripping performance and the abrasion resistance of the tires, can reduce the rolling resistance of the tires, and further has good processability. SOLUTION: This tread rubber composition comprising 100 pts.wt. of a dienic rubber component comprising >=20 pts.wt. of styrene-butadiene rubber having a glass transition temperature (Tg) of <=-27 deg.C and >=20 pts.wt. of at least one of natural rubber, isoprene rubber and butadiene rubber, 5 to 60 pts.wt. of aluminum hydroxide having a light bulk density of <=0.60 g/cm3, a DOP oil-absorbing amount of >= 70 to 250 cm3/100 g and a BET specific surface area of 30 to 350 m2/g, and 5 to 60 pts.wt. of carbon black having a BET specific surface area of >=60 m2/g.
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