Run-flat tire

A run-flat tire comprises a carcass (6) comprising at least one carcass ply (6A) of cords extending between a pair of bead portions (4) through a tread portion (2) and sidewall portions (3), a sidewall reinforcing rubber layer (9) disposed in each sidewall portion (3) and tapering towards its radially inner end and outer end from a central portion to have a crescent shape in a meridian section of the tire, and a reinforcing cord layer (10) disposed axially outside of each sidewall reinforcing rubber layer (9) and comprising at least one reinforcing ply (10A) with cords inclined in a radial direction of the tire.