A tire comprising: a bead portion; a sidewall portion continuously extended from the bead portion; a tread portion that comes into contact with a road surface; and a buttress portion extending inward in a tire radial direction from a tread end portion and continuously extended from the sidewall portion, the tread end portion being an outer end portion of the tread portion in a tread width direction, wherein first protrusions (203, 205) protruding in the tread width direction are formed in the buttress portions, and wherein the first protrusions (203, 205) are configured not to come into contact with the ground during normal travel when the tire is in brand-new condition, the tread portion comprising: circumferential grooves (20A, 20B) extending in the tire circumferential direction; lateral grooves (42A, 42B, 42C) extending in the tire width direction crossing the circumferential grooves (20A, 20B); land portions (400, 410, 420) defined by the circumferential grooves (20A, 20B) and the lateral grooves (42A, 42B, 42C), the first protrusions (203, 205) being formed on and protruding in the tread width direction from first side surfaces (400a, 420a) of the land portions (400, 410, 420); and second protrusions (203, 204, 205) formed on and protruding in the tread width direction from second side surfaces (400a, 410a, 420a) of the land portions (400, 420, 430), the second side surfaces (400a, 410a, 420a) crossing the tread width direction. a bead portion; a sidewall portion continuously extended from the bead portion; a tread portion that comes into contact with a road surface; and a buttress portion extending inward in a tire radial direction from a tread end portion and continuously extended from the sidewall portion, the tread end portion being an outer end portion of the tread portion in a tread width direction, wherein first protrusions (203, 205) protruding in the tread width direction are formed in the buttress portions, and wherein the first protrusions (203, 205) are configured not to come into contact with the ground during normal travel when the tire is in brand-new condition, the tread portion comprising: circumferential grooves (20A, 20B) extending in the tire circumferential direction; lateral grooves (42A, 42B, 42C) extending in the tire width direction crossing the circumferential grooves (20A, 20B); land portions (400, 410, 420) defined by the circumferential grooves (20A, 20B) and the lateral grooves (42A, 42B, 42C), the first protrusions (203, 205) being formed on and protruding in the tread width direction from first side surfaces (400a, 420a) of the land portions (400, 410, 420); and second protrusions (203, 204, 205) formed on and protruding in the tread width direction from second side surfaces (400a, 410a, 420a) of the land portions (400, 420, 430), the second side surfaces (400a, 410a, 420a) crossing the tread width direction. circumferential grooves (20A, 20B) extending in the tire circumferential direction; lateral grooves (42A, 42B, 42C) extending in the tire width direction crossing the circumferential grooves (20A, 20B); land portions (400, 410, 420) defined by the circumferential grooves (20A, 20B) and the lateral grooves (42A, 42B, 42C), the first protrusions (203, 205) being formed on and protruding in the tread width direction from first side surfaces (400a, 420a) of the land portions (400, 410, 420); and second protrusions (203, 204, 205) formed on and protruding in the tread width direction from second side surfaces (400a, 410a, 420a) of the land portions (400, 420, 430), the second side surfaces (400a, 410a, 420a) crossing the tread width direction.