Patent ID: 8362118

Claim:
A rubber composition for use in tires comprising: from 60 to 120 parts by weight of a silica having a CTAB specific surface area of from 80 to 170 m 2 /g and from 3 to 20 parts by weight of an aromatic modified terpene resin excluding terpene phenol resins per 100 parts by weight of a diene rubber comprising from 30 to 80 weight % of a terminal-modified styrene-butadiene rubber and from 10 to 50 weight % of a butadiene rubber; wherein the total of the terminal-modified styrene-butadiene rubber and the butadiene rubber is from 60 to 100 weight % based on the amount of the diene rubber, the terminal functional group of the terminal-modified styrene-butadiene rubber is a hydroxy group or an N-methylpyrrolidone group, the average glass transition temperature of the diene rubber is −55° C. to −70° C., the average glass transition temperature of a compound formed from the diene rubber, the aromatic modified terpene resin, and an optional oil component-containing plasticizer is from −45° C. to −60° C., the hydroxy value of the aromatic modified terpene resin is from 0 to 25 KOH mg/g, and the glass transition temperature of the aromatic modified terpene resin is from 20 to 80° C.