An aircraft tire comprising: a tire body forming an outer peripheral part of an aircraft wheel; and a protrusion that is provided protrusively on a side of the tire body, includes at one end thereof a pressure receiving surface configured to receive flight wind pressure and has a streamline shape tapering toward another end of the protrusion along a circumference of the tire body, for rotation of the aircraft wheel before touchdown in a direction in which the aircraft wheel rotates during a landing roll, through the action of the flight wind pressure received by the pressure receiving surface, wherein the protrusion includes: a pair of legs (11, 12) erected on the side of the tire body in spaced relation along a radius of the tire body, the pair of legs (11, 12) extending along the circumference of the tire body; a weight portion, wherein the pair of legs (11, 12) is configured to be caused, by centrifugal force that acts on the weight portion during the rotation of the aircraft wheel before touchdown, to fall over in a direction from a center of the tire body toward an outer periphery of the tire body to narrow the hollow part for reduction of an area of the pressure receiving surface, characterized in that the weight portion is supported by the pair of legs (11, 12) to have its center of gravity positioned outwardly of respective horizontal positions of the pair of legs (11, 12) with respect to a center line widthwise of the tire body; and a hollow part defined by the tire body, the pair of legs (11, 12), and the weight portion, the hollow part extending between the one end and the other end of the protrusion, wherein the pressure receiving surface is formed of respective end faces of the pair of legs (11, 12), an end face of the weight portion, and an internal surface of the hollow part. a tire body forming an outer peripheral part of an aircraft wheel; and a protrusion that is provided protrusively on a side of the tire body, includes at one end thereof a pressure receiving surface configured to receive flight wind pressure and has a streamline shape tapering toward another end of the protrusion along a circumference of the tire body, for rotation of the aircraft wheel before touchdown in a direction in which the aircraft wheel rotates during a landing roll, through the action of the flight wind pressure received by the pressure receiving surface, wherein the protrusion includes: a pair of legs (11, 12) erected on the side of the tire body in spaced relation along a radius of the tire body, the pair of legs (11, 12) extending along the circumference of the tire body; a weight portion, wherein the pair of legs (11, 12) is configured to be caused, by centrifugal force that acts on the weight portion during the rotation of the aircraft wheel before touchdown, to fall over in a direction from a center of the tire body toward an outer periphery of the tire body to narrow the hollow part for reduction of an area of the pressure receiving surface, characterized in that the weight portion is supported by the pair of legs (11, 12) to have its center of gravity positioned outwardly of respective horizontal positions of the pair of legs (11, 12) with respect to a center line widthwise of the tire body; and a hollow part defined by the tire body, the pair of legs (11, 12), and the weight portion, the hollow part extending between the one end and the other end of the protrusion, a pair of legs (11, 12) erected on the side of the tire body in spaced relation along a radius of the tire body, the pair of legs (11, 12) extending along the circumference of the tire body; a weight portion, wherein the pair of legs (11, 12) is configured to be caused, by centrifugal force that acts on the weight portion during the rotation of the aircraft wheel before touchdown, to fall over in a direction from a center of the tire body toward an outer periphery of the tire body to narrow the hollow part for reduction of an area of the pressure receiving surface, characterized in that the weight portion is supported by the pair of legs (11, 12) to have its center of gravity positioned outwardly of respective horizontal positions of the pair of legs (11, 12) with respect to a center line widthwise of the tire body; and a hollow part defined by the tire body, the pair of legs (11, 12), and the weight portion, the hollow part extending between the one end and the other end of the protrusion, wherein the pressure receiving surface is formed of respective end faces of the pair of legs (11, 12), an end face of the weight portion, and an internal surface of the hollow part.