A tire comprising: a tread portion in contact with a road surface; a tire side portion continuous to the tread portion and positioned inside in a tire radial direction of the tread portion; a bead portion continuous to the tire side portion and positioned inside in the tire radial direction of the tire side portion; and a belt layer disposed inside the tire radial direction of the tread portion, and a carcass forming the skeleton of the tire, wherein the belt layer comprises: a single inclined belt having an inclined cord inclined with respect to the tire width direction; and a circumferential belt disposed outside the tire radial direction of the inclined belt and having a circumferential cord wound along the tire circumferential direction, wherein the inclined cord and the circumferential cord are formed of a predetermined organic fiber, and a tread thickness of a rubber forming the tread portion along a tire radial direction at a position of a tire equatorial line is 5 mm or less, wherein the carcass comprises: a body portion; and a folded portion continuous to the body portion and folded back to outside in the tire width direction via a bead core, the bead portion has a bead filler-less structure in which disposition of a bead filler between the body portion and the folded portion is omitted. a tread portion in contact with a road surface; a tire side portion continuous to the tread portion and positioned inside in a tire radial direction of the tread portion; a bead portion continuous to the tire side portion and positioned inside in the tire radial direction of the tire side portion; and a belt layer disposed inside the tire radial direction of the tread portion, and a carcass forming the skeleton of the tire, wherein the belt layer comprises: a single inclined belt having an inclined cord inclined with respect to the tire width direction; and a circumferential belt disposed outside the tire radial direction of the inclined belt and having a circumferential cord wound along the tire circumferential direction, wherein the inclined cord and the circumferential cord are formed of a predetermined organic fiber, and a tread thickness of a rubber forming the tread portion along a tire radial direction at a position of a tire equatorial line is 5 mm or less, wherein a single inclined belt having an inclined cord inclined with respect to the tire width direction; and a circumferential belt disposed outside the tire radial direction of the inclined belt and having a circumferential cord wound along the tire circumferential direction, wherein the inclined cord and the circumferential cord are formed of a predetermined organic fiber, and a tread thickness of a rubber forming the tread portion along a tire radial direction at a position of a tire equatorial line is 5 mm or less, wherein the carcass comprises: a body portion; and a folded portion continuous to the body portion and folded back to outside in the tire width direction via a bead core, the bead portion has a bead filler-less structure in which disposition of a bead filler between the body portion and the folded portion is omitted. a body portion; and a folded portion continuous to the body portion and folded back to outside in the tire width direction via a bead core, the bead portion has a bead filler-less structure in which disposition of a bead filler between the body portion and the folded portion is omitted.