The pneumatic tire comprises a pair of bead cores, a pair of bead fillers disposed outward of the pair of bead cores in a tire radial direction, a carcass layer disposed folded around the bead cores and the bead fillers, and a steel chafer including an arranged plurality of steel cords, the steel chafer being disposed between the carcass layer and a rim engaging surface. A height Hs of an outer end portion of the steel chafer located outward of the bead fillers in a tire width direction and a rim flange height Hf have the relationship: 0.5Hs/Hf1.0, where the height is measured from a measuring position of a rim diameter.

A pneumatic tire with a reinforcement material includes: a tread that comes in contact with a road surface; side walls that extend and form shoulders and inner liners at both sides of the tread; a carcass that is integrally attached to the tread and the inner sides of the side walls and forms a turn-up head at both ends of the side walls; a belt layer that is layered on the tread of the carcass; and a bead that includes a bead core inserted in a wheel inside the turn-up head, a bead filler inserted in a side of the tread of the bead core, and a reinforcement material inserted in an interface of the turn-up head.

A tire comprises a bead having an axial width at the seat D comprising a circumferential reinforcing element (22) of which the radially innermost point (222) is at a radial distance Z and at an axial distance Y from the radially innermost point (211) of the bead, and such that Y/D is at least equal to 0.5 and Z/D is at most equal to 0.4. The end of the carcass reinforcement (311) is situated radially on the outside of the radially outermost point (223) of the circumferential reinforcing element. This same bead comprises at least one bead layer (23) surrounding the bead filler rubber (21) and such that its axially outermost end (231) is radially on the outside of the end (311) and such that its axially innermost end (232) is at least radially on the outside of the point (222).

A pneumatic tire includes a tread portion that is provided with two block rows formed of three circumferential grooves and a plurality of first transverse grooves. A block that configures the block rows has a hexagonal shape, and has a diagonal extension line passing through a pair of vertices positioned in the central portion in the tire-circumferential direction, the diagonal extension line overlapping, in the tire-circumferential direction, the first transverse groove of the adjacent block rows. The block has a first sipe that is terminated within a block extending in the tire-width direction. The first sipe is provided at a position shifted from the diagonal extension line in the tire-circumferential direction and in a region interposed between planes that are formed by extending, in a direction in which the first transverse groove extends, from a pair of groove wall surfaces of the first transverse groove of the adjacent block rows.

A tire comprises at least one bead having an axial width at the seat D comprises at least one main circumferential reinforcing element of which the radially innermost point is at a radial distance Z and at an axial distance Y from the radially innermost point of the bead, and such that Y/D is at least equal to 0.5 and Z/D is at most equal to 0.4. This same bead comprises at least one bead layer surrounding the bead filler rubber such that its axially outermost end is radially on the outside of the end of the carcass layer and it also comprises at least one additional circumferential reinforcing element, radially on the inside of the radially outermost point of the main circumferential reinforcing element.

Tyre suitable for running flat comprising a crown, two sidewalls and two beads, a carcass reinforcement anchored in each bead and a sidewall insert placed in each of the two sidewalls axially internally relative to the carcass reinforcement, such that it is equipped with an electronic device comprising at least one radiofrequency transponder and such that the electronic device is embedded in one of the sidewall inserts.

A pneumatic tire has a turned-up carcass ply and a non-turnup carcass ply. The turned-up carcass ply is turned up around bead cores in respective bead portions from the inside to outside of the tire so as to form a pair of turned up portions extending radially outwardly on the axially outsides of the respective bead cores, and a main portion extending between the turned up portions. The non-turnup carcass ply extends between the bead portions and terminates to have edges positioned on the axially outsides of the respective turned up portions. The bead portions are each provided on its outer surface with vent lines protruding therefrom and extending continuously in the tire circumferential direction. The vent lines include a radially outer vent line formed radially outside the edges of the non-turnup carcass ply, and a radially inner vent line formed radially inside the edges of the non-turnup carcass ply.

In a side reinforcing type tire 2, when a cross-sectional height of the tire 2 is denoted by L, a height in a radial direction from a bead base line to an outer edge of a core 34 is denoted by HC, a point on a turned-up portion 42 of a carcass ply 38 at which point a height in the radial direction from the bead base line is 0.35 times of the height L is denoted by P1, and a point on the turned-up portion 42 at which point the height in the radial direction from the bead base line is equal to the height HC is denoted by P2, the turned-up portion 42 has, between the point P1 and the point P2, a shape that is a curved line projecting inward in an axial direction, a straight line, or a combination thereof.

A pneumatic tire has a carcass layer, a side wall rubber which forms an outer surface of a side wall portion, and a rim strip rubber which forms an outer surface of a bead portion. The rim strip rubber extends in a tire radial direction between the carcass layer and the side wall rubber. A height of the rim strip rubber on the basis of an outer diameter position of a bead core buries in the bead portion is equal to or more than 70% of a height of a tire outer diameter position. A thickness Tw of the rim strip rubber at the tire maximum width position is smaller than the maximum thickness Tm of the rim strip rubber which is closer to an outer side in the tire radial direction than the tire maximum width position.

In a tire 32, in a radial direction, a first end 92 of each filler 52 is located inward of a bead base line, and a second end 94 of each filler 52 is located between an end 88 of a turned-up portion 86 and the bead base line. Each bead 40 includes a core 64, a first apex 70 that surrounds the core 64, and a second apex 72 that is located outward of the first apex 70 in the radial direction. An outer periphery of the first apex 70 has a rounded contour. The first apex 70 is harder than the second apex 72.