Patent ID: 8865836

Claim:
A tire rubber composition comprising: a modified diene rubber A which is modified with an acrylamide compound represented by the following formula (I); and a modified diene rubber B which is modified with a modifying compound represented by the following formula (III) alone or together with a silicon or tin compound represented by the following formula (II), a weight average molecular weight of a total of the modified diene rubbers A and B being 300,000 to 1,400,000, the formula (I) being as follows: wherein R 1 represents hydrogen or a methyl group, R 2 and R 3 each represent an alkyl group, and n represents an integer; the formula (II) being as follows: R a MX b (II) wherein R represents an alkyl, alkenyl, cycloalkenyl, or aromatic hydrocarbon group, M represents silicon or tin, X represents halogen, a represents an integer of 0 to 2, and b represents an integer of 2 to 4; and the formula (III) being as follows: wherein R 4 to R 6 are the same as or different from each other and each represent a C 1-8 alkyl group, R 7 to R 12 are the same as or different from each other and each represent a C 1-8 alkoxy or alkyl group, and p to r are the same as or different from each other and each represent an integer of 1 to 8.