| 摘要 |
PROBLEM TO BE SOLVED: To provide a rubber composition for a cap tread of truck and bus tires with which low fuel consumption performance, abrasion resistance, rubber strength and wet grip performance are improved in good balance and to provide truck and bus tires comprising the same. ! SOLUTION: There is provided a rubber composition which comprises a rubber component and silica (A) and silica (B) having different nitrogen adsorption specific surface areas, wherein the content of a conjugated diene-based polymer which has a conjugated diene monomer unit, a monomer unit having a carbon-carbon double bond and a substituted silyl group and a monomer unit having a carbon-carbon double bond and a substituted amino group or a nitrogen-containing hetero group and at least one terminal of which is modified by the following compound (G) is 5 mass% or more in 100 mass% of the rubber component, the total content of the silica (A) and (B) is 5 to 150 pts.mass and the content of the silica (A) and (B) is a specific rat |
