A pneumatic tire has a bead portion provided with a bead core and a bead apex rubber. The bead apex rubber extends radially outward from the radially outer surface of the bead core, and has a radially outer end not positioned in a first region. The first region is defined between a first radial line and a second radial line. The first radial line extends straight through a radially outer end of a contact area where the bead portion comes into contact with a flange of a wheel rim. The second radial line extends straight through a position spaced 10 mm axially outward from the radially outer end of the contact area.

Provided is a bias tire including: bead cores; a bead filler disposed outward of each of the bead cores in a radial direction; and a carcass layer stretching between the bead cores, wrapping around end portions of the bead cores, the carcass layer having opposite ends turned back to be fixed, wherein in a cross section in a meridian direction, a cord on an innermost side of the carcass layer in a tire lateral direction has a curved shape projecting laterally outward at a height from 0.9 times to 1.6 times a height of a flange of a rim on which the bias tire is assembled, and in the cross section in the meridian direction, a cord on an outermost side of the carcass layer in the lateral direction has a curved shape projecting laterally outward at a height from 1.1 times to 1.6 times the height of the flange.

A pneumatic tire is mounted on a 5° rim. A bead core includes a bottom inclined 0°-5° in a direction in which the bottom diverges outward in the radial direction as the bottom extends from an inner side toward an outer side in the width direction. A bead includes a base, a toe, a heel, and a back surface. The heel connects to the back surface by an arc. The base includes a region between a core lower inner end position on an inner circumferential surface of the bead and being identical to a position of a bead core inner end and a core lower outer end position on an inner circumferential surface of the bead and being identical to a position of a bead core outer end in the width direction. The base has a curved line projecting toward the inner side in the radial direction in a cross-section.

A pneumatic tire is mounted on a 5° rim. A bead core includes a bottom inclined 0°-5° in a direction in which the bottom diverges outward in the radial direction as the bottom extends from an inner side toward an outer side in the width direction. A bead includes a base, a toe, a heel, and a back surface. The heel connects to the back surface by an arc. The base includes a region between a core lower inner end position on an inner circumferential surface of the bead and being identical to a position of a bead core inner end and a core lower outer end position on an inner circumferential surface of the bead and being identical to a position of a bead core outer end in the width direction. The base has a curved line projecting toward the inner side in the radial direction in a cross-section.

A pneumatic tire has a non-stretchable tread (30) flanked by two shoulder regions (34), and two non-stretchable bead regions (36) for mounting the tire to a wheel, each bead region being connected via a sidewall to the corresponding bead region. Each sidewall has a first portion (38) extending inwardly relative to a width of the tire from one of the bead regions (36) to a deflection region (40), and a second portion (42) extending outwardly relative to the width of the tire from the deflection region (40) to a corresponding one of the shoulder regions (34). A non-stretchable girth-limiting configuration (44, 46, 56) and a radial reinforcing structure (48, 50, 52) are associated with the first portion (38) of each of the sidewalls, thereby limiting radial flexing of first portion (38) and maintaining an annular concavity between the bead region (36) and the shoulder region (34).

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.

A pneumatic tire having a pair of annular bead areas (12), a pair of sidewalls, and a crown portion wherein a carcass ply (22) wraps around a radial inner side (RSj,2o) of each bead ring (20), for each bead area (12) a first layer of rubber material (30) is arranged radially inward from both the bead ring radial inner side (RSi,2o) and the carcass ply (22) and a second layer of rubber material (40) is arranged radially inward from the first layer of rubber material (30), each of the first layer of rubber material (30) and the second layer of rubber material (40) extending substantially across a full width (W20) of the corresponding bead ring (20), each of the first and second layer of rubber material (30, 40) having a modulus of elongation, where the modulus of elongation of the second layer of rubber material (40) is equal to or greater than substantially 125% of the modulus of elongation of the first layer of rubber material (30).

A pneumatic tire having a pair of annular bead areas (12), a pair of sidewalls, and a crown portion wherein a carcass ply (22) wraps around a radial inner side (RSj,2o) of each bead ring (20), for each bead area (12) a first layer of rubber material (30) is arranged radially inward from both the bead ring radial inner side (RSi,2o) and the carcass ply (22) and a second layer of rubber material (40) is arranged radially inward from the first layer of rubber material (30), each of the first layer of rubber material (30) and the second layer of rubber material (40) extending substantially across a full width (W20) of the corresponding bead ring (20), each of the first and second layer of rubber material (30, 40) having a modulus of elongation, where the modulus of elongation of the second layer of rubber material (40) is equal to or greater than substantially 125% of the modulus of elongation of the first layer of rubber material (30).

A pneumatic tire (1) having: a toroidal carcass (2), which is comprised of a body ply (3) partially collapsed onto itself and therefore having two lateral flaps; two annular beads (4), each of which is surrounded by the body ply (3) and has a bead core (5) and a bead filler (6); an annular tread (7); a pair of sidewalls (11) arranged externally to the body ply (3) between the tread (7) and the beads (4); a pair of abrasion gum strips (12) arranged externally to the body ply (3) under the sidewalls (13) and at the beads (4); and a transponder (13) which is arranged in contact with the body ply (3) at a flap of the body ply (3) and is located below an edge (19) of the body ply (3) between the edge (19) of the body ply (3) and the bead (4).

A pneumatic tire (1) having: a toroidal carcass (2), which is comprised of a body ply (3) partially collapsed onto itself and therefore having two lateral flaps; two annular beads (4), each of which is surrounded by the body ply (3) and has a bead core (5) and a bead filler (6); an annular tread (7); a pair of sidewalls (11) arranged externally to the body ply (3) between the tread (7) and the beads (4); a pair of abrasion gum strips (12) arranged externally to the body ply (3) under the sidewalls (13) and at the beads (4); and a transponder (13) which is arranged in contact with the body ply (3) at a flap of the body ply (3) and is located below an edge (19) of the body ply (3) between the edge (19) of the body ply (3) and the bead (4).