Tire mold

A tire mold comprising:

• a pair of side plates;
• a pair of bead rings abutting on the side plates;
• and a gas venting passage lying between the side plates and the bead rings, wherein
• each of the bead rings has:
• a cavity surface;
• an outer side surface situated opposite to the cavity surface;
• and an outer peripheral surface connecting the cavity surface and the outer side surface,
• the outer peripheral surface has two regions in a direction of a bead ring thickness, one region being referred to as a first outer peripheral surface adjoining the cavity surface and the other region being referred to as a second outer peripheral surface adjoining the outer side surface,
• a first gap is lying between the first outer peripheral surface and the side plate by the presence of a knurled groove on the first outer peripheral surface,
• a second gap is lying between the second outer peripheral surface and the side plate by making an outside diameter of the second outer peripheral surface smaller than an outside diameter of the first outer peripheral surface,
• a third gap is lying between the outer side surface and the side plate by the presence of a plurality of vent grooves on the outer side surface, and
• the first to third gaps function as the gas venting passage.