| 摘要 |
A rubber composition including 100 parts by weight of a rubber component composed of 50 to 80 parts by weight of natural rubber (NR) and/or polyisoprene rubber (IR), 15 to 45 parts by weight of polybutadiene rubber (BR) and 2 parts by weight to less than 10 parts by weight of a solution polymerized styrene-butadiene copolymer rubber (S-SBR) having a styrene content of 15 to 35% by weight and a vinyl bond content of a butadiene portion thereof of more than 30% to less than 75%.
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