A pneumatic tire is provided. A tire outer surface contour line from a sidewall portion to a bead portion has a center on a tire axial line passing a tire maximum width position and has a contour arc, which passes the tire maximum width position and is connected to a bead heel portion of the bead portion; and a contour straight line, which has one end connected to the contour arc and the other end connected to the bead heel portion. A connection part of the contour straight line and the bead heel portion is set such that a height H1 in a tire radial direction from a bead toe to the tire maximum width position and a height H5 in the tire radial direction from the bead toe fall with a range of (0.3H1)H5(0.25H1). A connection part of the contour arc and the contour straight line is set such that a height H2 in the tire radial direction from the bead toe falls within a range of (0.9H1)H2(0.75H1).

The assembly (24) comprises: a woven first fabric (26) extending in an overall direction (G1) and comprising filamentary warp elements (64) extending in a direction (C1) parallel to the overall direction (G1) comprising first and second filamentary members, a woven second fabric (28), a bearing structure (30) comprising filamentary bearing elements (32) connecting the woven first and second fabrics together, each filamentary bearing element (32) comprising a filamentary bearing portion (74) extending between the woven first and second fabrics (28). For a length at rest L of the woven first fabric (26): for any elongation of the woven first fabric (26) less than or equal to (2H)/L, the first filamentary member has a non-zero elongation and is not broken; there is an elongation of the woven first fabric (26), less than or equal to (2H)/L, beyond which the second filamentary member is broken, in which H0KH where H0 is the distance between the woven first and second fabrics (26, 28) when each filamentary bearing portion (74) is at rest, and K=0.50.

The assembly (24) comprises: a first structure (10) extending in a first overall direction (G1), a second structure (12), and a bearing structure (30) comprising filamentary bearing elements (32) comprising at least one filamentary bearing portion (74) extending between the first structure (10) and the second structure (12), the first structure (10) being arranged such that, for a length at rest L of the first structure (10) in the first overall direction (G1), the elongation at maximum force Art of the first structure in the first overall direction (G1) satisfies: Art(2H)/L, in which H0KH where H0 is the mean straight-line distance between an internal face (42) of the first structure (10) and an internal face (46) of the second structure (12) when each filamentary bearing portion (74) is at rest, and K=0.50.

This pneumatic tire (1) includes: a pair of bead cores (11, 11); a carcass layer (13) extending between the pair of bead cores (11, 11); and a belt layer (14) including a laminate of at least four belt plies (141 to 144) having steel belt cords covered with coating rubber, the belt layer being disposed on the outer side in a tire radial direction of the carcass layer (13). An inter-cord distance (Ga) between an outermost layer belt ply (fourth belt (144)) and an adjacent belt ply (third belt (143)) has a relationship such that 0.80Ga/max1.80 with respect to a maximum value (max) of outer diameters (4, 3) of belt cords (1441, 1431) in the outermost layer belt ply (144) and the adjacent belt ply (143).

This pneumatic tire (1) includes: a pair of bead cores (11, 11); a carcass layer (13) extending between the pair of bead cores (11, 11); and a belt layer (14) including a laminate of at least four belt plies (141 to 144) having steel belt cords covered with coating rubber, the belt layer being disposed on the outer side in a tire radial direction of the carcass layer (13). An inter-cord distance (Ga) between an outermost layer belt ply (fourth belt (144)) and an adjacent belt ply (third belt (143)) has a relationship such that 0.80Ga/max1.80 with respect to a maximum value (max) of outer diameters (4, 3) of belt cords (1441, 1431) in the outermost layer belt ply (144) and the adjacent belt ply (143).

A pneumatic tire is provided where a profile line in a tire meridian cross section of a center land portion defined by circumferential grooves and located on a tire equator is curved projecting outward in a tire radial direction. A carcass layer and a reinforcing layer include a recess portion curved projecting inward in the tire radial direction in a bottom region of the center land portion.

A radial tire with a lightened belt structure (10) comprises a multilayer composite laminate (10a, 10b, 10c) of specific construction, with a first layer (10a) of rubber (C1) reinforced with preferably weakly heat-shrinkable circumferential textile monofilaments (110) with a diameter greater than 0.10 mm or assemblies of such monofilaments, for example, made of nylon or of polyester, this first layer radially (in the direction Z) surmounting two other layers (10b, 10c) of rubber (C2, C3, respectively) reinforced with monofilaments (120, 130) of high tensile steel. The first reinforcers have an envelope diameter between 0.20 mm and 1.20 mm and a density, measured in the axial direction Y, between 70 and 130 threads/dm, and the second and third reinforcers each have a diameter between 0.20 mm and 0.50 mm and a density, measured in the axial direction Y, between 100 and 180 threads/dm.

A radial tire with a lightened belt structure (10) comprises a multilayer composite laminate (10a, 10b, 10c) of specific construction, with a first layer (10a) of rubber (C1) reinforced with preferably weakly heat-shrinkable circumferential textile monofilaments (110) with a diameter greater than 0.10 mm or assemblies of such monofilaments, for example, made of nylon or of polyester, this first layer radially (in the direction Z) surmounting two other layers (10b, 10c) of rubber (C2, C3, respectively) reinforced with monofilaments (120, 130) of high tensile steel. The first reinforcers have an envelope diameter between 0.20 mm and 1.20 mm and a density, measured in the axial direction Y, between 70 and 130 threads/dm, and the second and third reinforcers each have a diameter between 0.20 mm and 0.50 mm and a density, measured in the axial direction Y, between 100 and 180 threads/dm.

A pneumatic tire comprises a tread portion, a pair of sidewall portions, a pair of bead portions, a carcass extending between the portions, and an inner rubber extending between the portions, on the inner side of the carcass.

The inner rubber comprises a first portion extending through the tread portion with a first thickness and a second portion extending through the sidewall portions with a second thickness smaller than the first thickness. The land ratio of the tread portion 2 is 65% or more.

A pneumatic tire comprises a tread portion, a pair of sidewall portions, a pair of bead portions, a carcass extending between the portions, and an inner rubber extending between the portions, on the inner side of the carcass.

The inner rubber comprises a first portion extending through the tread portion with a first thickness and a second portion extending through the sidewall portions with a second thickness smaller than the first thickness. The land ratio of the tread portion 2 is 65% or more.