Provided is a heavy-duty pneumatic tire in which not only occurrence of a damage of CBU but also occurrence of pulling-out of a carcass ply can be inhibited, and which has excellent durability. In the tire, beads each include a cover enclosing at least a part of a core. The cover is located, between the core and the carcass ply, in a portion at which the carcass ply encloses the core. The cover is composed of one cover ply including a large number of aligned cover cords and a cover topping rubber covering the cover cords. A ratio of a distance between the cover cords to an outer diameter of a carcass cord is not lower than 0.35 and not higher than 0.85. A difference between a hardness of the cover topping rubber and a hardness of a carcass topping rubber is not less than −5 and not greater than 5.

Provided is a heavy-duty pneumatic tire in which not only occurrence of a damage of CBU but also occurrence of pulling-out of a carcass ply can be inhibited, and which has excellent durability. In the tire, beads each include a cover enclosing at least a part of a core. The cover is located, between the core and the carcass ply, in a portion at which the carcass ply encloses the core. The cover is composed of one cover ply including a large number of aligned cover cords and a cover topping rubber covering the cover cords. A ratio of a distance between the cover cords to an outer diameter of a carcass cord is not lower than 0.35 and not higher than 0.85. A difference between a hardness of the cover topping rubber and a hardness of a carcass topping rubber is not less than −5 and not greater than 5.

A heavy truck tire is provided with a bead design that has a bead core and a reinforcement ply that wraps around a section of the bead core and has a return casing ply. Bead filler is present that has a portion radially outward from the bead core and axially inboard from the return casing ply. A stiffener layer is present that has a portion located outboard from the return casing ply. The bead has a first bead layer with a portion between the return casing ply and the stiffener layer, and a second bead layer that has a portion outboard from the stiffener layer. The stiffness of the first and second bead layers is 8 MPa to 14 MPa. The stiffness of the bead filler is less than the stiffness of the first and second bead layers.

In a pneumatic tire in which a carcass layer is turned up from a tire inner side to a tire outer side around a bead core of each bead portion, a transponder is embedded between the carcass layer and a rubber layer disposed in a sidewall portion on an outer side of the carcass layer, the transponder extending along a tire circumferential direction in contact with the rubber layer, and the transponder is disposed 10 mm or more away from an end of a turned up portion of the carcass layer in a tire radial direction.

A pneumatic tire includes a pair of bead portions, a pair of bead cores each disposed in a respective one of the pair of bead portions, a carcass extending between the pair of bead cores, the carcass including a carcass ply that includes a main portion extending between the pair of bead cores and a pair of turn-up portions each turned up around a respective one of the pair of bead cores from axially inside to outside of the tire and extending outwardly in a tire radial direction, and a reinforcing rubber layer disposed in each bead portion and being adjacent to an axially outside of the turn-up portion, wherein the reinforcing rubber layer has a laminated body in which a plurality of sheet-shaped rubber members having different radial lengths are laminated in the tire axial direction.

In a pneumatic tire in which a carcass layer is turned up from a tire inner side to a tire outer side around a bead core, an end of a turned up portion of the carcass layer is disposed between a body portion of the carcass layer and a belt layer, a transponder that extends along time circumferential direction is embedded between the turned up portion of the carcass layer and a rubber layer disposed in a sidewall portion on an outer side of the carcass layer, and the transponder is disposed between a position (P1) located on an outer side of and 15 mm away from an upper end of the bead core in a tire radial direction and a position (P2) located on an inner side of and 5 mm away from an end of the belt layer in the tire radial direetion

A tire having a transponder comprises: a crown which has a crown reinforcement with an axial end at each edge, joined at each of its axial ends to a bead, which has an inner end, by a sidewall; a carcass reinforcement which is formed of adjacent first wires and is anchored in each bead around a spiral formed by second wires; the transponder comprising a core defining a first axis, a first cover wire helically wound around the core and an electrical insulation device; and the first cover wire comprising at least two conductive wire elements galvanically connected to an electronic chip comprising a radiofrequency transceiver component. The thickness of the elastomer mixture separating the outer cover wire, which is located furthest outwards from the first axis, and the reinforcements is greater than 0.5 millimeter.

Motorcycle wheel tyre (1), comprising a carcass structure (2), a belt structure (6) arranged in a radially outer position with respect to the carcass structure (2) and a tread band (8) arranged in a radially outer position with respect to the belt structure (6). The tread band (8) comprises, in an axially inner annular portion thereof, a pair of circumferential grooves (20) arranged on opposite sides with respect to an equatorial plane (X-X) of the tyre (1). The carcass structure (2) comprises at least one carcass ply (3) having opposite end edges (3a) associated with respective annular reinforcing structures (4) to form respective beads (15). Each bead (15) comprises at least one reinforcing element (18) made of an elastomeric material having a rigidity in a circumferential direction greater than the rigidity in a radial direction.

Provided is a run-flat tire. A first bead filler is disposed on an outer circumferential side of a bead core, a second bead filler is disposed on an outer side in a tire width direction of a turned up portion of the carcass layer along the turned up portion of the carcass layer, and a thickness G on a first reference line of a side reinforcing layer, a thickness G1 on a second reference line of the side reinforcing layer, and a thickness G2 on a third reference line of the side reinforcing layer satisfy the relationships of 0.8×G≤G1≤1.0×G and 0.5×G≤G2≤0.7×G.

A pneumatic tire includes a pair of bead portion, a pair of bead cores, a carcass extending between the pair of bead cores, and a pair of bead apex rubbers. Each bead core includes a core inner surface on an inner side in the tire radial direction of the bead core. In a pre-assemble state, each core inner surface has an angle of 20 degrees plus/minus 2 degrees to the tire axial direction, and is inclined outwardly in the tire radial direction toward an outer side in the tire axial direction. The bead apex rubber includes a first rubber portion arranged so as to cover a circumference of the bead core and having a circular or substantially elliptical outline, and a second rubber portion tapering outwardly in the tire radial direction from the first rubber portion. The first rubber portion is greater in hardness than the second rubber portion.