This tire has a buttress section to which a plurality of depressions (100) have been formed along the tire peripheral direction (DC). The depressions (100) have: a first outer edge (110) that bulges inward in the tread width direction (DT); and a second outer edge (120) that is continuous with the first outer edge (110) and that bulges outward in the tread width direction (DT) with respect to the first outer edge (110). The distance between the deepest section (150) of the depressions (100) and the ground-contact end of the tread varies along the tire peripheral direction (DC).