Abstract: A tire side surface of a pneumatic tire includes a two-dimensional code in which a dot pattern is formed by two types of gray scale elements formed identifiable from each other by recesses and protrusions of the tire side surface, or a predetermined two-dimensional code arrangement region. The tire side surface further includes at least two marks formed in a protruded shape or a recessed shape, and the two marks are disposed on an identical position in a first direction of a tire radial direction and a tire circumferential direction and disposed separated from each other at different positions in a second direction of the tire radial direction and the tire circumferential direction to sandwich an outer edge of the two-dimensional code or the predetermined two-dimensional code arrangement region from the opposite sides in at least one of the tire radial direction or the tire circumferential direction.

Abstract: In manufacturing a pneumatic tire, a replaceable member having a smooth flat surface is attached to a mold body of a tire mold configured to vulcanize an unvulcanized tire into a predetermined shape by contact with the unvulcanized tire. A mold inner surface that forms the shape of a tire side surface portion includes a curved surface of the mold body and the flat surface surrounded by the curved surface. A vulcanized tire is produced by vulcanizing the unvulcanized tire by bringing the unvulcanized tire into contact with the mold inner surface. A two-dimensional code is engraved in a planar surface region of the vulcanized tire, which corresponds to the flat surface. In the two-dimensional code, a dot pattern is formed by two types of gray scale elements that are formed identifiable from each other by surface unevenness.

Abstract: A tire side surface of a pneumatic tire includes a two-dimensional code in which a dot pattern is formed by two types of gray scale elements formed identifiable from each other by recesses and protrusions of the tire side surface, or a predetermined two-dimensional code arrangement region. The tire side surface further includes at least two marks formed in a protruded shape or a recessed shape, and the two marks are disposed on an identical position in a first direction of a tire radial direction and a tire circumferential direction and disposed separated from each other at different positions in a second direction of the tire radial direction and the tire circumferential direction to sandwich an outer edge of the two-dimensional code or the predetermined two-dimensional code arrangement region from the opposite sides in at least one of the tire radial direction or the tire circumferential direction.