Provided is a pneumatic tire having excellent durability by defining a viscosity and a softening point of a coumarone resin within predetermined ranges. The pneumatic tire uses a reinforcing material having a coumarone resin film formed on a surface thereof. The coumarone resin film includes a coumarone resin having a viscosity from 350 to 2200 Pa.Math.sec at a temperature of 160 C. and a softening point from 75 to 130 C., and the reinforcing material is at least one of a bead wire or a steel cord. The coumarone resin film preferably has a thickness from 0.05 to 0.40 m. The reinforcing material is preferably the bead wire or the steel cord.

Provided is a pneumatic tire using a reinforcing material having a coumarone resin film formed on a surface thereof. The coumarone resin film includes a coumarone resin having a viscosity from 350 to 2200 Pa.Math.sec at a temperature of 160 C. and a softening point from 75 to 130 C., and the reinforcing material is at least one of abead wire or a steel cord.

A pneumatic tire is provided that can achieve performance that is equivalent to or higher than that of known tires while allowing weight reduction of bead cores by using, for the bead cores, a composite cord. A pneumatic tire includes annular bead cores (5) embedded in bead portions (3), and a carcass layer (4) locked on the bead cores (5). Each of the bead cores (5) includes a cable bead structure in which a composite cord (10) is spirally wound around an annular core body (20), the composite cord including a core wire (11) formed of carbon fibers and a plurality of siding wires (12) formed of glass fibers disposed around the core wire (11).

A bead member for a tire, including: a bead wire; a first bead filler that is in contact with the bead wire directly or via another layer and is arranged in a region including at least a region at an outer side of the bead wire in a tire radial direction; and a second bead filler that is in contact with the first bead filler directly or via another layer and is arranged in a region including at least a region at an outer side of the first bead filler in the tire radial direction, the first bead filler including a resin A, the second bead filler including a resin B, and the resin B having a melting point higher than that of the resin A.

A bead member for a tire, including: a bead wire; a first bead filler that is in contact with the bead wire directly or via another layer and is arranged in a region including at least a region at an outer side of the bead wire in a tire radial direction; and a second bead filler that is in contact with the first bead filler directly or via another layer and is arranged in a region including at least a region at an outer side of the first bead filler in the tire radial direction, the first bead filler including a resin A, the second bead filler including a resin B, and the resin A having a melting point higher than that of the resin B.

A bead core of the present disclosure is a bead core comprising an annular body in which a strip member comprising one or more bead wires coated with a coating resin is wound and stacked, and in an axial cross section of the annular body, an interface between stacks adjacent to each other is non-linear. A manufacturing method of a bead core of the present disclosure comprises an annular body forming step of winding and stacking a strip member comprising one or more bead wires coated with a coating resin to form an annular body, and the strip member has a side that comes in contact with an adjacent stack in the annular body forming step and that is non-linear in a cross section orthogonal to an extending direction of the strip member.

A method of building a tire having no ply turnup is described. The method includes the steps of applying an inner liner and chafer onto a tire building drum; radially expanding the center portion of the drum and applying a first column bead, applying a layer of ply followed by the winding of a second column bead and the application of an apex, turning up the chafer and then inflating the carcass under low pressure below 150 mbars, applying the tread, applying the sidewall. A method of molding a green tire having a first and second bead area is described herein, wherein the method includes the steps of: inserting a tire clamping device inside a tire bladder and then inserting the tire clamping device and the bladder into the green tire, aligning the outer surfaces of the tire clamping device are in engagement with a respective bead area of the tire so that each tire bead area is clamped between a respective upper and lower mold ring and the tire clamping device during cure.

A bead for a tire in accordance with the present invention includes a core with at least one yarn of a multifilament textile fiber embedded in an organic matrix having a density between 0.9 g/m.sup.3 and 2.0 g/m.sup.3 and an outer sheath layer including at least one metal wire wound around, and in contact with, the core. The core has a diameter between 5.0 mm and 30.0 mm.

A bead core of the present disclosure is a bead core comprising an annular body in which a strip member comprising one or more bead wires coated with a coating resin is wound and stacked, and in an axial cross section of the annular body, the strip member has two side surfaces, and has at least one end portion of at least one of the two side surfaces that is chamfered.

Provided is a bead member comprising an annular bead core, and a bead filler located on an outer side of the bead core in a radial direction of the bead core, and the bead filler comprises a resin filler portion made of a resin and a rubber filler portion made of a rubber and joined to the resin filler portion.

A run-flat tire has: a pair of bead cores, each bead core formed by covering a wire with resin; a carcass that straddles the pair of bead cores, and having end portions that are anchored on the bead cores; side reinforcing rubbers that are provided at tire side portions, and that extend in a tire radial direction along an inner surface of the carcass; and a tread that is provided at an outer side, in a tire radial direction, of the carcass.