Rubber composition and pneumatic tire using the same for tread

摘要

A rubber composition, in which wet grip performance and dry grip performance can be improved without lowering rolling resistance property, and a pneumatic tire using the same for a tread. The rubber composition comprising 5 to 150 parts by weight of silica having 3 to 100 of an average aspect ratio L₁/D between branched particles A-A containing branched particles A on the basis of 100 parts by weight of a rubber component containing a diene rubber, said branched particle A being a particle with which at least 3 other particles contact is provided.