| abstract |
Provided are a rubber composition and a pneumatic tire for breaker topping that can improve low fuel efficiency, hardness, elongation at break, and adhesion. A rubber component, silica, sulfur, a specific vulcanization accelerator, a compound represented by the following formula, and / or a hydrate thereof, stearic acid and / or stearic acid cobalt; A total amount of cobalt relates to a rubber composition for breaker topping, each having a specific value: MO 3 SS- (CH 2 ) q -S-SO 3 M (Wherein q represents an integer of 3 to 10, M is the same or different, and represents lithium, potassium, sodium, magnesium, calcium, barium, zinc, nickel or cobalt). |