Tire vulcanizing mold

A tire vulcanizing mold which is divided into an upper-mold and a lower-mold in the tire axial direction by a split surface, each of said upper-mold and the lower-mold comprising a base part having a bead molding surface for a tire-bead and a sidewall molding surface for a tire-sidewall, and a tread ring part having a tread molding surface for a tire-tread and a buttress molding surface for a tire-buttress, wherein

• said tread ring part is divided into a plurality of tread segments by radial split surfaces extending from the tire axis in the tire radial direction,
• each of said tread segments has a stop surface contacting with the base part at a reference position where the radial split surfaces of the tread ring part contact to each other, and is supported on the base part tiltably around a center line in the tangential direction of a circle centered on the tire axis between the reference position and a releasing position where the radial split surfaces are separated to each other, and
• a radial distance from the tire axis to the tread molding surface at the releasing position is larger than a radial distance from the tire axis to the tread molding surface at the reference position.