Patent ID: 7989550

Claim:
A rubber composition for a tire tread of a high performance tire of a sports car or of a racing car comprising (A) 100 parts by weight of a rubber component comprising (a) 50 to 95 parts by weight of a diene-based rubber containing 50 to 100% by weight of a styrene-1,3-butadiene copolymer rubber having an average glass transition temperature T g of −43° C. to −5° C. and (b) 5 to 50 parts by weight of a conjugated diene-based rubber gel having a toluene swelling index Q i of 16 to 70 and 51.9 to 89.9% by weight of conjugated diene monomer units 48 to 10% by weight of an aromatic vinyl monomer units and 0.1 to 1.2% by weight of polyfunctional monomer units, (B) 3 to 40 parts by weight, based upon 100 parts by weight of the total rubber component, of a dipentene-styrene copolymer resin having a softening point of 125° C. to 150° C. and (C) 50 to 200 parts by weight, in total, of carbon and silica having a nitrogen adsorption specific surface area (N 2 SA) of 80 to 400 m 2 /g.