| abstract |
A pneumatic tire having a tire component prepared by use of a rubber composition according to the present invention which comprises: a polybitadiene (i) which satisfies conditions of (A) a Mooney viscosity (ML 1+4, 100°C ) of 43 to 70, (B) a ratio (Tcp/ML 1+4, 100°C ) of 5% by mass toluene solution viscosity (Tcp) to Mooney viscosity (ML 1+4, 100°C ) of 0.9 to 1.7, (C) a stress relaxation time (T80), being a time until a torque is attenuated by 80% assuming that the torque at the end of ML 1+4, 100°C measurement is 100%, of 10.0 to 40.0 seconds, (D) a molecular weight distribution (Mw/Mn) of 2.50 to 4.00, and (F) a proportion of cis-structure in microstructural analysis of not more than 98 mol%; another rubber (ii); and a rubber reinforcing material (iii), is excellent in processability and properties of tire. |