| 摘要 |
In a pneumatic run flat tire in which an inner side reinforcing rubber layer having a falcated cross-section is disposed in a side wall portion, dynamic elastic moduli E′10A, E′10B, and E′10C and values T10A, T10B, and T10C of a tanδat 60° C. of rubber compositions of each region of the inner side reinforcing rubber layer are configured so as to satisfy the relationships E′10A<E′10B<E′10C, E′10A≧4.0 MPa, T10A<T10B<T10C, and T10A≰0.06. Dynamic elastic moduli E′20A, E′20B, and E′20C at 60° C. of rubber compositions of each region of the outer side rubber layer are configured so as to satisfy the relationships E′20B<E′20A≰E′20C and E′20C/E′20B≧1.6. Furthermore, the dynamic elastic modulus ratios E′20A/E′10A and E′20C/E′10C are configured so as to satisfy the relationships 0.6≰E′20A/E′10A≰1.0 and 0.6≰E′20C/E′10C≰1.0.
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