Patent ID: 7235599

Claim:
A rubber composition comprising 70 to 150 parts by weight of carbon black with a nitrogen adsorption specific area of 100 to 300 m2/g based on 100 parts by weight of a rubber component comprising a solution polymerization styrene-butadiene rubber satisfying the formula below: (Vinyl content)≧100 −2 x(styrene content), 30 to 170 parts by weight of a softener and 1 to 30 parts by weight of a compound satisfying the general formula (1): —(R−S x ) n− (1) (wherein R is —(CH 2 —CH 2 —O) m —CH 2 —CH 2 — , x is an integer of 3 to 6, n is an integer of 10 to 400 and m represents an integer of 2 to 5.