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 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.

Heavy vehicle tire with two beads (2) contacting rim (3) an outer face (21), radial carcass reinforcement (4) having carcass layer (41) wound within each bead (2) around bead wire (5) having center (O) to form turnup (411), additional circumferential reinforcement (6), in each bead (2), having additional layer (61, 62), additional reinforcement (6) extending radially from radially inner end (E.sub.1) to radially outer end (E.sub.2) and axially on outerside of axially outermost turnup (411). The orthogonal projection (P.sub.1) of radially inner end (E.sub.1) of additional circumferential reinforcement (6) onto axially outer face (21) of bead (2) is radially on outside of center (O) of bead wire (5), the orthogonal projection (P.sub.2) of radially outer end (E.sub.2) of additional circumferential reinforcement (6) onto axially outer face (21) of the bead (2) contacting point (P.sub.2) of rim (3) that is axially on inside of point (C) of last contact of rim (3) when tire (1) is mounted and inflated, and radial distance (d) between end (E.sub.1) and end (E.sub.2) of additional circumferential reinforcement (6) is at most 20 mm.

Aircraft tire (1) comprising two beads (2). In each bead (2) portion (8) comprises surface layer (9) in contact with rim (3) via radially interior bead face (4) and having a shear stiffness K.sub.1. Portion (8) comprises a rigid layer (10), radially on the outside of and adjacent to the surface layer (9), having a shear stiffness K.sub.2 at least equal to five times the shear stiffness K.sub.1 of the surface layer (9), and a deformable layer (11), radially on the outside of and adjacent to the rigid layer (10) and radially on the inside of and adjacent to the carcass reinforcement portion (5) radially on the inside of the bead wire (7), having a shear stiffness K.sub.3 at most equal to 0.3 times the shear stiffness K.sub.1 of the surface layer (9).

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.

Tire comprising two beads comprising a bead wire and a carcass anchored around the two bead wires by turning back, a squat filler of small height, a sidewall stiffening reinforcement which is metallic, an outer strip of soft rubber compound, placed axially on the outside of the carcass and of the filler, and a protective layer of rubber compound, wherein the assembly formed by the stiffening reinforcement and the outer strip has a thickness EB(R) and the protective layer has a thickness EE(R), R being the distance with respect to the radially innermost point of the bead wire, and wherein the thicknesses EB(R) and EE(R) satisfy a set of geometric conditions.

Tire having two beads having an annular reinforcing structure and a carcass reinforcement anchored in the two beads by a turn-up. Each bead has a bead rubber filler extending a radial distance from the radially innermost point of the annular reinforcing structure of the bead. The radial distance is not more than 10% of the tire's radial height. A sidewall has rigidifying metal reinforcing elements oriented along an angle not more than 10 to the circumferential direction and positioned with the distance between the radially innermost point of the annular reinforcing structure and the radially outer end of the rigidifying reinforcement between 20% and 40%, inclusive, of the tire's radial height and with the distance between the radially innermost point of the annular reinforcing structure and the radially inner end of the rigidifying reinforcement not more than 20% of the tire's radial height.