A runflat tire includes a tire body, a carcass extending from a tread portion through sidewall portions of the tire body to bead cores in bead portions of the tire body, and sidewall-reinforcing rubber layers having cross-sectional crescent shapes and positioned on inner sides of the carcass along the sidewall portions, respectively. The tire body has height Ha in range of 8˜17 mm where the height Ha is measured from a rim line of the tire body to inner edge of an innermost dimple/fin row of the tire body in radial direction of the tire body, the innermost row is formed in dimple/fin forming region including one or more dimple/fin rows having dimple/fin portions arrayed in circumferential direction of the tire body, and the dimple/fin forming region is formed on external surface of a sidewall portion on outer side of the rim line in the radial direction.