| 摘要 |
<p>A pneumatic tire includes at least two types of cap tread rubber layers made from differing rubber compositions disposed in a tread portion. A tanδat 60° C. of a rubber composition forming the cap tread rubber layer on a vehicle outer side is greater than a tanδat 60° C. of a rubber composition forming the cap tread rubber layer on a vehicle inner side. A ratio (tanδH/tanδL) of a maximum tanδH to a minimum tanδL at 60° C. of the tanδof the rubber compositions forming the at least two types of cap tread rubber layers is from 1.05 to 1.80 . An under tread rubber layer disposed in the tread portion has an average thickness from 0.8 mm to 4.0 mm. A hardness of a rubber composition forming the under tread rubber layer is from 73 to 83. A tanδat 60° C. of the rubber composition forming the under tread rubber layer is 0.25 or less.</p> |
