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 (D T ); and a second outer edge (120) that is continuous with the first outer edge (110) and that bulges outward in the tread width direction (D T ) 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).