Patent ID: 7472732
Filing Date: 2009-01-06
Classification: C08K,C08L

Abstract:
1. A motocross competition tire having a ratio of blocks to land of about 23%, wherein said blocks are at least 15 mm high, said tire comprising rubber composition comprising: 10 to 100 parts by weight of carbon black having nitrogen-adsorbing specific surface area of 160 to 300 m 15 to 70 parts by weight of an oil, based on 100 parts by weight of a rubber component comprising 20 to 95% by weight of a styrene butadiene copolymer rubber having styrene content of at least 30% and vinyl content of at least 30% and 5 to 80% by weight of butadiene rubber, and silica in an amount of 20 to 100% by weight of said carbon black; wherein the total amount of said carbon black and said silica is 20 to 120 parts by weight, the hardness is 65 to 85, the complex elastic modulus is 5.0 to 25.0 and the tangent loss is 0.25 to 0.45.