Pneumatic tire

A pneumatic tire comprising:

• a cylindrical annular structure;
• a rubber layer, which will become a tread portion, provided along a circumferential direction of the annular structure on an outer side of the annular structure;
• a carcass portion including fibers covered with rubber, provided on at least both sides in a width direction of the cylindrical structure including the annular structure and the rubber layer;
• an extending portion that extends from both sides in the width direction of the annular structure farther outward in the width direction than a ground contact edge on the outer side in the width direction of the tread portion, and that is provided in plurality on both sides in the width direction along the circumferential direction of the annular structure;
• and
• a product of an elastic modulus of the annular structure and a thickness of the annular structure is not less than 10 GPa·mm and not more than 500 GPa·mm,
• wherein the pneumatic tire comprises a pair of bead portions including a pair of bead wires on an inner side in a radial direction and on a portion where the tire is attached to the rim of the wheel, and a bead filler disposed on an outer side in the radial direction of the bead portion, and
• the extending portion folds back at an outer side in the width direction of the bead wires and extends to an inner side in the width direction of the bead filler.