Run-Flat Tire

A run-flat tire, comprising:

• a tread portion;
• a sidewall portion disposed on each of both sides of the tread portion;
• a bead portion disposed toward the inside of the sidewall portion in a tire radial direction;
• a carcass layer extending from the tread portion through the sidewall portion to the bead portion, and comprising an end portion folded back in the bead portion toward the outside in a tire lateral direction while the carcass layer is wound in a tire circumferential direction;
• an innerliner layer disposed in an inner circumferential surface of the carcass layer;
• side reinforcing rubber disposed between the carcass layer and the innerliner layer in the sidewall portion;
• first bead filler rubber disposed toward the inside of a folded back portion of the carcass layer in the tire lateral direction;
• and
• second bead filler rubber disposed toward the outside of the folded back portion of the carcass layer in the tire lateral direction along the carcass layer;
• the side reinforcing rubber having a thickness from a reference position toward the inside of a tire cross-sectional height in the tire radial direction to a position toward the outside within a range of 38% or more and 68% or less of the tire cross-sectional height in the tire radial direction being within a range of 90% or more and 100% or less of a maximum thickness of the side reinforcing rubber;
• and
• at least in a range from a position in the tire radial direction of a rim check line to a position being 38% of the tire cross-sectional height outward from the reference position in the tire radial direction, a total thickness of the side reinforcing rubber, the first bead filler rubber, and the second bead filler rubber being within a range of 100% or more and 140% or less of the maximum thickness of the side reinforcing rubber.