A tire comprising: a tread portion with a groove portion formed to extend in a tire circumferential direction (tcd); a plurality of protrusion portions provided on a groove bottom (50B2) of the groove portion, each of the protrusion portions extending from one side wall forming the groove portion to the other side wall (50B3) opposed to the one side wall (50B1), the protrusion portions arranged at predetermined intervals in the groove portion, wherein a relationship of 1.25L< P ≤ 10L is satisfied when a length of the protrusion portion along a groove center line passing through a center in a width direction of the groove portion is L, and the predetermined interval is P in a tread surface view of the tire, further comprising a buttress portion that extends inward in a tire radial direction (trd) from a tread end portion being an outer end of the tread portion in a tread width direction (twd), and extends continuous to a side wall portion, and a lateral groove portion that extends from the groove portion to the buttress portion and has an opening in the buttress portion, the lateral groove portion extending while being inclined in the tread width direction (twd) in the tread surface view of the tire, wherein an inclination angle of the lateral groove portion with respect to the tread width direction (twd) is not less than 15 degrees and not more than 60 degrees, characterized in that an angle θf, which is an angle formed by an extending direction of the protrusion portions and the groove center line in the tread surface view of the tire and is an angle formed on a side opposite to a rotation direction of the tire, is not less than 10 degrees and not more than 60 degrees, wherein when the groove width of the circumferential groove is W, and the width of the protrusion portion in the direction perpendicular to the extending direction (x) of the protrusion portion is TWf, a relationship of TWf/cosθf ≤ 0.9 W is satisfied, wherein a land block is formed on the tread portion by dividing a circumferential land portion on an outermost side in the tread width direction (twd) and extending along the tire circumferential direction (tcd) with the lateral groove portion, and wherein a tapered surface is formed so as to chamfer a corner portion on the tread end portion where tread surface, a side surface formed on the outside in the tread width direction (twd) of the land block and a lateral groove surface formed on one side of the tire circumferential direction (tcd) of the land block intersect with each other. a tread portion with a groove portion formed to extend in a tire circumferential direction (tcd); a plurality of protrusion portions provided on a groove bottom (50B2) of the groove portion, each of the protrusion portions extending from one side wall forming the groove portion to the other side wall (50B3) opposed to the one side wall (50B1), the protrusion portions arranged at predetermined intervals in the groove portion, wherein a relationship of 1.25L< P ≤ 10L is satisfied when a length of the protrusion portion along a groove center line passing through a center in a width direction of the groove portion is L, and the predetermined interval is P in a tread surface view of the tire, further comprising a buttress portion that extends inward in a tire radial direction (trd) from a tread end portion being an outer end of the tread portion in a tread width direction (twd), and extends continuous to a side wall portion, and a lateral groove portion that extends from the groove portion to the buttress portion and has an opening in the buttress portion, the lateral groove portion extending while being inclined in the tread width direction (twd) in the tread surface view of the tire, wherein an inclination angle of the lateral groove portion with respect to the tread width direction (twd) is not less than 15 degrees and not more than 60 degrees, characterized in that an angle θf, which is an angle formed by an extending direction of the protrusion portions and the groove center line in the tread surface view of the tire and is an angle formed on a side opposite to a rotation direction of the tire, is not less than 10 degrees and not more than 60 degrees, wherein when the groove width of the circumferential groove is W, and the width of the protrusion portion in the direction perpendicular to the extending direction (x) of the protrusion portion is TWf, a relationship of TWf/cosθf ≤ 0.9 W is satisfied, wherein a land block is formed on the tread portion by dividing a circumferential land portion on an outermost side in the tread width direction (twd) and extending along the tire circumferential direction (tcd) with the lateral groove portion, and wherein a tapered surface is formed so as to chamfer a corner portion on the tread end portion where tread surface, a side surface formed on the outside in the tread width direction (twd) of the land block and a lateral groove surface formed on one side of the tire circumferential direction (tcd) of the land block intersect with each other.