| abstract |
The present invention provides a rubber composition for tires that is capable of improving crack resistance, ozone resistance, discoloration resistance, and the external appearance of tires in a well-balanced manner; and to provide a pneumatic tire using the rubber composition for tires. In this rubber composition for tires, the total content of a butadiene rubber, natural rubber, and isoprene rubber is at least 80 mass% relative to 100 mass% of the rubber composition, and the rubber composition contains, relative to 100 mass parts thereof: 0.1-8.0 mass parts of a polyether (excluding pluronic non-ionic surfactants) (A) that is formed from at least 80 mass% of a glycol ether component and has a HLB value of 3.5-19.0; 2-70 mass parts of carbon black; and 0.3-7.0 mass parts of an age retarder. |