| abstract |
Provided is a rubber composition that can obtain a vulcanized rubber excellent in fracture resistance, crack resistance, and low heat build-up. The rubber composition contains a rubber component (A), carbon black (B) having a CTAB specific surface area of 30 to 110 m 2 /g, and silica (C) having a CTAB specific surface area of 200 m 2 /g or more, and carbon black (B). The total amount of the content (b) and the content (c) of the silica (C) is 30 to 80 parts by mass relative to 100 parts by mass of the rubber component (A), (b): (c)=70 to 85: 30 to 15. |