A run-flat tire 1 comprises a carcass 6, a pair of side reinforcing rubber layers 9, and a pair of sidewall rubber components 10. At a tire maximum-width position, a first side reinforcing rubber layer 9A disposed in the side of a first bead portion has a thickness B1 greater than a thickness B2 of a second side reinforcing rubber layer disposed in the side of a second bead portion, and a first sidewall rubber component disposed in the side of the first bead portion has a thickness A1 smaller than a thickness A2 of a second sidewall rubber component disposed in the side of the second bead portion.