| 主权项 |
1. A pneumatic run flat tire comprising a carcass layer mounted between a pair of left and right bead portions, a belt layer disposed on an outer circumferential side of the carcass layer in a tread portion, and an inner side reinforcing rubber layer having a falcated cross-section disposed on an inner side in a tire width direction of the carcass layer in a side wall portion; wherein
an outer side reinforcing rubber layer is disposed on an outer side in the tire width direction of the carcass layer from the bead portion throughout the side wall portion, a center of gravity position in a meridian cross-section of the outer side reinforcing rubber layer is positioned inward in a tire radial direction of a position where tire width is greatest, volumes of the inner side reinforcing rubber layer and the outer side reinforcing rubber layer are each different on a vehicle inner side and a vehicle outer side when the pneumatic run flat tire is mounted on a vehicle, a ratio V1out/V1in of a volume V1out of the inner side reinforcing rubber layer on the vehicle outer side to a volume V1in of the inner side reinforcing rubber layer on the vehicle inner side is from 1.10 to 1.35, and a ratio V2in/V2out of a volume V2in of the outer side reinforcing rubber layer on the vehicle inner side to a volume V2out of the outer side reinforcing rubber layer on the vehicle outer side is from 1.10 to 1.50. |
