Abstract: Provided is a rubber composition for tire treads that is capable of producing tire treads for which abrasion resistance, rolling resistance, factory workability, and chipping resistance have been simultaneously improved, and a pneumatic tire manufactured using the same. The rubber composition according to the present invention includes 20 parts by mass to 100 parts by mass of carbon black combined with 100 parts by mass of a rubber component. The carbon black has a CTAB surface area of 60 m2/g to 105 m2/g, a 24M4DBP oil absorption of 70 cm3/100 g to 105 cm3/100 g, a N2SA/IA of 0.95 or less, and satisfies Expression (1). TINT (%)+0.4×24M4DBP oil absorption (cm3/100 g)?0.

Abstract: The invention is to provide a rubber composite and tire using the rubber composite, which, when the rubber composite is used as the tread rubber of a tire, enables the tire to have high wear resistance and hence have a long life while presenting a low rolling resistance and enables an automobile that uses the tires to reduce fuel consumption during traveling. The rubber composite of the invention comprises 100 parts by weight of a rubber component composed of at least one kind of rubber, selected from a group of natural rubber, synthetic isoprene rubber and synthetic diene rubber and 10 to 100 parts by weight of a carbon black blended therein, the carbon black is specified to satisfy the relation X/Y?0.84, where X is the mercury intrusion specific surface area (m2/g), measured by mercury porosimetry and Y is the CTAB specific surface area (m2/g). The tire of the invention is one that uses the above rubber composite as its tread portion.

Abstract: The invention is to provide a rubber composite and tire using the rubber composite, which, when the rubber composite is used as the tread rubber of a tire, enables the tire to have high wear resistance and hence have a long life while presenting a low rolling resistance and enables an automobile that uses the tires to reduce fuel consumption during traveling. The rubber composite of the invention comprises 100 parts by weight of a rubber component composed of at least one kind of rubber, selected from a group of natural rubber, synthetic isoprene rubber and synthetic diene rubber and 10 to 100 parts by weight of a carbon black blended therein, the carbon black is specified to satisfy the relation X/Y?0.84, where X is the mercury intrusion specific surface area (m2/g), measured by mercury porosimetry and Y is the CTAB specific surface area (m2/g). The tire of the invention is one that uses the above rubber composite as its tread portion.