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 plurality of carcass layers extending from the tread portion through the sidewall portion to the bead portion, each comprising an end portion folded back in the bead portion toward the outside in a tire lateral direction while the carcass layers are wound in a tire circumferential direction;
• an innerliner layer disposed in an inner circumferential surface of the carcass layers;
• side reinforcing rubber disposed between the carcass layers and the innerliner layer in the sidewall portion;
• first bead filler rubber disposed toward the inside of a folded back portion of the carcass layers in the tire lateral direction;
• and
• second bead filler rubber disposed toward the outside of the folded back portion of the carcass layers in the tire lateral direction along the carcass layers;
• 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.