A tire (10, 110, 210, 310) comprising: a tread portion including a tread surface and a groove (18, 118, 218, 318) that partitions the tread surface, a ratio of a groove width to a groove depth (groove width/groove depth) of the groove (18, 118, 218, 318) being from 0.5 to 8.0; and a plurality of protrusions (34, 36; 134, 136; 234; 334) that protrude from a bottom surface of the groove (18, 118, 218, 318), a height of each protrusion (34, 36; 134, 136; 234; 334) being from 0.1 mm to 1.0 mm, and the plurality of protrusions(34, 36; 134, 136; 234; 334) being arranged having an interval of greater than 0.1 mm and less than or equal to 1.0 mm, wherein the groove (18, 118, 218, 318) is formed including a pair of side surfaces, the bottom surface, and a pair of curved surfaces respectively connecting a side surface and the bottom surface, and wherein the tire (10,110, 210, 310) further comprises a plurality of other protrusions (44, 46, 54, 56; 144, 146, 154,156; 244, 254; 344, 354,) that protrude from the side surfaces and the curved surfaces, a height of the other protrusions (44, 46, 54, 56; 144, 146, 154,156; 244, 254; 344, 354) being from 0.1 mm to 1.0 mm, and the plurality of other protrusions (44, 46, 54, 56; 144, 146, 154,156; 244, 254; 344, 354) being arranged having an interval of greater than 0.1 mm and less than or equal to 1.0 mm, characterized in that: the height of the protrusions (34, 36; 134, 136; 234; 334) formed at the bottom surface, a height of other protrusions (44, 46; 144, 146; 244; 344) formed at the curved surfaces, and a height of other protrusions (54, 56; 154, 156; 254; 354) formed at the side surfaces decrease in order from the protrusions (34, 36; 134, 136; 234; 334) formed at the bottom surface to the other protrusions (54, 56; 154, 156; 254; 354) formed at the side surfaces, or the interval between the protrusions (34, 36; 134, 136; 234; 334) formed at the bottom surface, an interval between other protrusions (44, 46; 144, 146; 244; 344) formed at the curved surfaces, and an interval between other protrusions (54, 56; 154, 156; 254; 354) formed at the side surfaces increase in order from the protrusions (34, 36; 134, 136; 234; 334) formed at the bottom surface to the other protrusions (54, 56; 154, 156; 254; 354) formed at the side surfaces. a tread portion including a tread surface and a groove (18, 118, 218, 318) that partitions the tread surface, a ratio of a groove width to a groove depth (groove width/groove depth) of the groove (18, 118, 218, 318) being from 0.5 to 8.0; and a plurality of protrusions (34, 36; 134, 136; 234; 334) that protrude from a bottom surface of the groove (18, 118, 218, 318), a height of each protrusion (34, 36; 134, 136; 234; 334) being from 0.1 mm to 1.0 mm, and the plurality of protrusions(34, 36; 134, 136; 234; 334) being arranged having an interval of greater than 0.1 mm and less than or equal to 1.0 mm, wherein the groove (18, 118, 218, 318) is formed including a pair of side surfaces, the bottom surface, and a pair of curved surfaces respectively connecting a side surface and the bottom surface, and wherein the tire (10,110, 210, 310) further comprises a plurality of other protrusions (44, 46, 54, 56; 144, 146, 154,156; 244, 254; 344, 354,) that protrude from the side surfaces and the curved surfaces, a height of the other protrusions (44, 46, 54, 56; 144, 146, 154,156; 244, 254; 344, 354) being from 0.1 mm to 1.0 mm, and the plurality of other protrusions (44, 46, 54, 56; 144, 146, 154,156; 244, 254; 344, 354) being arranged having an interval of greater than 0.1 mm and less than or equal to 1.0 mm, characterized in that: the height of the protrusions (34, 36; 134, 136; 234; 334) formed at the bottom surface, a height of other protrusions (44, 46; 144, 146; 244; 344) formed at the curved surfaces, and a height of other protrusions (54, 56; 154, 156; 254; 354) formed at the side surfaces decrease in order from the protrusions (34, 36; 134, 136; 234; 334) formed at the bottom surface to the other protrusions (54, 56; 154, 156; 254; 354) formed at the side surfaces, or the interval between the protrusions (34, 36; 134, 136; 234; 334) formed at the bottom surface, an interval between other protrusions (44, 46; 144, 146; 244; 344) formed at the curved surfaces, and an interval between other protrusions (54, 56; 154, 156; 254; 354) formed at the side surfaces increase in order from the protrusions (34, 36; 134, 136; 234; 334) formed at the bottom surface to the other protrusions (54, 56; 154, 156; 254; 354) formed at the side surfaces. the height of the protrusions (34, 36; 134, 136; 234; 334) formed at the bottom surface, a height of other protrusions (44, 46; 144, 146; 244; 344) formed at the curved surfaces, and a height of other protrusions (54, 56; 154, 156; 254; 354) formed at the side surfaces decrease in order from the protrusions (34, 36; 134, 136; 234; 334) formed at the bottom surface to the other protrusions (54, 56; 154, 156; 254; 354) formed at the side surfaces, or the interval between the protrusions (34, 36; 134, 136; 234; 334) formed at the bottom surface, an interval between other protrusions (44, 46; 144, 146; 244; 344) formed at the curved surfaces, and an interval between other protrusions (54, 56; 154, 156; 254; 354) formed at the side surfaces increase in order from the protrusions (34, 36; 134, 136; 234; 334) formed at the bottom surface to the other protrusions (54, 56; 154, 156; 254; 354) formed at the side surfaces.