RUBBER COMPOSITION FOR TIRES

摘要

A rubber composition for a pneumatic tire tread comprises 10 to 120 parts by weight of carbon black and 0.5 to 5 parts by weight of a vulcanizer based on 100 parts by weight of a particularly defined styrene-butadiene copolymer rubber alone or a blend rubber of not less than 30 parts by weight of the particular copolymer rubber and not more than 70 parts by weight of other diene rubber, the styrene-butadiene copolymer rubber being obtained by random copolymerization of styrene with 1,3-butadiene and satisfying certain defined requirements.