Patent ID: 8871832

Claim:
A rubber composition for use in tire treads comprising: a rubber component comprising from 40 to 80 parts by mass of a natural rubber and from 20 to 60 parts by mass of a diene rubber (other than said natural rubber) and, per 100 parts by mass thereof, from 80 to 150 parts by mass of a carbon black having a nitrogen specific surface area of from 300 to 400 m 2 /g and from 30 to 80 parts by mass of a resin, wherein the resin is selected from the group consisting of: α-pinene resin, β-pinene resin, limonene resin, dipentene resin, and terpene styrene resin; and wherein the diene rubber is a styrene-butadiene copolymer rubber having a glass transition temperature of from −35 to 0° C.