A bead portion of a tire includes: a bead portion including a core; a first filler arranged at the core; a carcass extending around the core and the first filler and radially inward adjacent an axially inner side of the core, the carcass further extending axially outward adjacent the core and radially outward adjacent the core; a second filler extending both axially and radially beyond the first filler, the second filler overlapping the first filler, an outermost end of the second filler being positioned radially outward from the first filler; a first chafer disposed at the second filler; a second chafer extended about the carcass; and a flipper extending radially inward from a position axially adjacent the first filler. The second filler is embedded at a convergence of the first chafer and a sidewall.

A pneumatic tire 1 comprises a carcass 6 comprising a carcass ply (6A) comprising a main body portion (6a) and turned up portions (6b), and bead apex rubbers 8. Each of the bead apex rubbers 8 comprises a first rubber portion 10 and a second rubber portion 11 provided on an outer side in a tire axial direction of the first rubber portion and having smaller rubber hardness than the first rubber portion. A ratio H1/H2 of a height (H1) of an outer end (10e) in a tire radial direction of the first rubber portion 10 from a bead base line (BL) and a height (H2) of an outer end in the tire radial direction of each of the turned up portions (6b) from the bead base line (BL) is in a range of from 1.4 to 1.7.

A pneumatic tire includes a bead portions and a bead core at the bead portions, the tire being mounted to a 15°-tapered specified rim. The bead portions include a portion inward in a radial direction of an extension line of an inner circumferential surface of the bead core, the extension line extending in the lateral direction, that is positioned outward in the tire lateral direction of an imaginary line passing through a first intersection point between the extension line and a tire inner surface and extends inward in the tire radial direction from the extension line at an angle perpendicular to the extension line. An angle α formed by the imaginary line and a line segment passing through a second intersection point between a bead base and the tire inner surface and the first intersection point between the extension line and the tire inner surface is from 0° to 25°.

A pneumatic tire comprises: a bead portion provided with an inside bead apex rubber disposed between a turned up portion and a main portion of a carcass ply, and an outside bead apex rubber disposed axially outside the turned up portion and having a radially outer edge; and a the sidewall portion provided with a sidewall reinforcing cord layer disposed axially outside the carcass and having a radially inner edge which is spaced apart from the radially outer edge of the outside bead apex rubber by a radial distance of not less than 5% of a tire section height.

The present invention provides a tire having improved bead endurance in which cords of a steel chafer are waved and the advancing direction of the waves of the steel chafer is perpendicular to the advancing direction of carcass cords, thereby minimizing cracks at an edge of the carcass. The tire having a chafer structure for enhancing bead endurance includes: a carcass having carcass cords; and a steel chafer covering the carcass and having a plurality of waved chafer cords.

A heavy-duty pneumatic tire includes a carcass ply including a main portion extending between bead cores and a pair of turn-up portions, a first reinforcing layer of a steel cord disposed in each bead portion in a U-shaped manner, and a second reinforcing layer of an organic fiber cord disposed in each bead portion and at least a part of the second reinforcing layer extending in a radial direction of the tire at an axially outward location of the first reinforcing layer. The second reinforcing layer includes an axially inner second ply and an outer second ply. The outer second ply has an inner end positioned below the bead core. The inner second ply has an inner end located axially inward of the inner end of the outer second ply, and has a substantially same length as the outer second ply in a tire cross-section.

A tire includes: a tread portion including a tread surface; a pair of sidewall portions that extend inward in a tire radial direction from both sides of the tread portion in a tire width direction; and a pair of bead portions each of which includes a bead core that is elongated continuously to an inside of the sidewall portion in the tire radial direction and extends continuously in an annular shape in a tire circumferential direction, and a bead filler disposed adjacent to the bead core and outside the bead core in the tire radial direction. A density of the reinforcing cords changes in a range from 20% inclusive to 60% inclusive of a tire sectional height from a tire inner end in the tire radial direction, and such that an outside of an area, in which the density changes, has a low density of the reinforcing cords.

A tire includes a tread portion, a sidewall portion, and a bead portion. The bead portion includes a bead core that extends continuously in an annular shape in a tire circumferential direction, and a bead filler disposed adjacent to the bead core and outside the bead core in a tire radial direction. Reinforcing cords are provided in the bead portion and the sidewall portion so as to be curved such that inclination angles of the reinforcing cords with respect to the tire circumferential direction gradually increase with nearness to an outside in the tire radial direction.

A pneumatic tire mountable on a 15 tapered specified rim, the pneumatic tire including a bead portion, bead core, a carcass, a steel cord reinforcing layer, and a bead rubber layer. A distance from a second line segment to a third line segment is from 4 mm to 8 mm, and a ratio R2/R1 is from 0.935 to 0.975, wherein R2 is a tire radius at a bead toe of a bead base portion and R1 is a tire radius at a bead heel.

A pneumatic tire mountable on a 15 tapered specified rim includes a bead core, a carcass, a steel cord reinforcing layer, a bead rubber layer, an organic fiber reinforced layer, and a first reinforcing rubber layer. A distance from a second line segment to a third line segment is from 4 mm to 12 mm, a complex modulus of the first reinforcing rubber layer is from 6 MPa to 10 MPa, an elongation at break of the first reinforcing rubber layer is from 300% to 450%, and a difference between a first height and a second height is from 3 mm to 15 mm.