| abstract |
The object is to provide a tire rubber composition and a tire having excellent crack resistance and tear resistance as well as excellent fuel economy. A synthetic isoprene having a weight average molecular weight (Mw) of 800,000 or more, a molecular weight distribution (Mw / Mn) of 2.5 or less, and a cis-1,4 bond content of 96% or more. The rubber composition for tires which contains the rubber component (A) containing, carbon black (B), and a specific carbon black dispersing agent (C), and a tire using the same. 【Selection chart】 None |