RUBBER COMPOSITION FOR TIRES, AND PNEUMATIC TIRE

To provide a rubber composition for tires exhibiting excellent wet performance, excellent low rolling resistance, and excellent steering stability, when a tire is formed, and a pneumatic tire including the rubber composition for tires. The rubber composition for tires of the present invention contains a diene rubber, silica, a silane coupling agent, a fatty acid metal salt, and a predetermined alkyltrialkoxysilane; the diene rubber containing 60 mass% or greater of a modified conjugated diene rubber and 30 mass% or greater of a particular conjugated diene rubber which corresponds to a part or all of the modified conjugated diene rubber; an average glass transition temperature of the diene rubber being from -45 to -20°C; the particular conjugated diene rubber being a conjugated diene rubber produced by a particular production method and having predetermined ranges of aromatic vinyl unit content, vinyl bond content, and weight average molecular weight.