In a pneumatic tire including belt layers in a tread portion, the belt layers include a cross belt pair in which reinforcing cords constituting the belt layers intersect each other between layers, a distance between a tire outer surface and an end point of the cross belt pair measured in parallel to a line segment connecting a ground contact edge and an edge portion on the outer side of the outermost groove in the width direction on an outer surface of the tread portion satisfies 15 mm?D1?25 mm, a distance between the belt layer and a carcass layer at a position corresponding to an outer end point in an effective width of the cross belt pair satisfies 2.5 mm?G1?9.0 mm, and a ratio between a height H? from a core separation point to a maximum outer diameter position of the carcass layer and a height H? to the maximum width position satisfies 0.55?H?/H??0.65.

Tire having at least one carcass reinforcement, a tread, a belt reinforcer having a first and a second end and: a reinforcing ply, having a transverse half-width L2, having a reinforcing polymer layer between two layers of coating rubber, at least one hooping ply, surmounting the reinforcing ply, having a transverse half-width L1, and filamentary reinforcing elements, parallel two by two, forming an angle at most equal to 7 with respect to the circumferential direction, the tire having at least one layer of edge uncoupling rubber, positioned at least radially between the hooping ply and the reinforcing ply and positioned at at least one transverse end of the belt reinforcer, the layer of edge uncoupling rubber having a total length between 10 and 40 mm and a thickness between 0.2 and 1.2 mm, having at least one reinforcing ply, and at at least one end of the belt reinforcer, the half-widths L1 and L2 are different, and manifest a difference (L1L2) between 5 and 10 mm.

A pneumatic tire including: on a tread of the tire, inclined belt layer and circumferential belt layer; and on the tread surface, a plurality of circumferential grooves extending in the tread circumferential direction, and shoulder land portions partitioned between the circumferential grooves located outermost in the tire width direction and tread ground contact ends. Positions of the tread surface that correspond to the outermost ends of the circumferential belt layer in the tire width direction are within the shoulder land portions, and the distance in the tire width direction between the outermost ends in the tire width direction of the circumferential belt layer and tire equator side ends of the shoulder land portions is 12% or more and 22% or less of a half of the width of the circumferential belt layer in tire width direction.

A radial tire includes a crown reinforcement or belt having a lightened belt structure. The lightened belt structure is constructed of a multilayer composite laminate that includes a first layer of rubber that radially surmounts, in a direction Z, two other layers of rubber. The first layer of rubber includes weakly heat-shrinkable textile circumferential reinforcers, for example, made of nylon or polyester. The two other layers of rubber are reinforced with monofilaments of high tensile steel. The first reinforcers have a diameter between 0.40 mm and 0.70 mm and a density between 70 and 130 threads/dm, and the second and third reinforcers have a diameter between 0.20 mm and 0.50 mm and a density between 120 and 180 threads/dm.

A radial tire includes a crown reinforcement or belt having a lightened belt structure. The lightened belt structure is constructed of a multilayer composite laminate that includes a first layer of rubber that radially surmounts, in a direction Z, two other layers of rubber. The first layer of rubber is reinforced with first reinforcers, which are circumferential heat-shrinkable polyester textile reinforcers. The two other layers of rubber are reinforced with second and third reinforcers, which are monofilaments of high tensile steel. The first reinforcers have a diameter between 0.40 mm and 0.70 mm and a density between 70 and 130 threads/dm, and the second and third reinforcers have a diameter between 0.20 mm and 0.50 mm and a density between 120 and 180 threads/dm.

A tire having a radial carcass reinforcement, composed of at least one layer of metal reinforcing elements, the said tire comprising a crown reinforcement, itself topped radially by a tread, the said tread being joined to two beads via two sidewalls. The metal reinforcing elements of at least one layer of the carcass reinforcement are cords exhibiting, in the permeability test, a flow rate of less than 20 cm.sup.3/min and at least one layer of the carcass reinforcement is provided, on at least one face, with textile threads exhibiting, in the permeability test, a flow rate of between 1 and 3 cm.sup.3/min.

A pneumatic tire comprises a carcass layer, a belt layer disposed on an outer side of the carcass layer in a tire radial direction, and a tread rubber disposed on the outer side of the belt layer in the tire radial direction. The belt layer formed by laminating an angle belt having a belt angle 45 and 70 in absolute values, a pair of cross belts, having belt angles of 10 and 45 in absolute values and having belt angles of mutually opposite signs, and a circumferential reinforcing layer having a belt angle within a range of 5 with respect to a tire circumferential direction. A tread width TW and a cross-sectional width Wca of the carcass layer have a relationship such that 0.82TW/Wca0.92. A width Ws of the circumferential reinforcing layer and a cross-sectional width Wca of the carcass layer such that 0.60Ws/Wca0.70.

The present invention is directed to a tire comprising a tread and a belt portion located radially below the tread, wherein the belt portion comprises a pair of working belts and a low angle belt. The low angle belt has reinforcement elements having an angle of less than 5 with a circumferential direction of the tire. In a first aspect, the low angle belt comprises a first layer and one or more further layers, wherein the first layer extends over at least 70% of the axial width of the axially largest working belt, and wherein each layer of the one or more further layers extends over at most 50% of the width of the axially largest working belt and is arranged radially below one of the shoulder grooves.

A pneumatic tire includes a carcass layer, a belt layer that is disposed on the outer side in the tire radial direction of the carcass layer, and a tread rubber that is disposed on the outer side in the tire radial direction of the belt layer. The pneumatic tire also includes at least three circumferential main grooves extending in the tire circumferential direction, and a plurality of land portions that are defined by these circumferential main grooves. The belt layer includes an inner-side cross belt and outer-side cross belt having belt angles of not less than 51 and not more than 80 as absolute values with respect to the tire circumferential direction, the belt angles having mutually opposite signs, and a circumferential reinforcing layer having a belt angle that satisfies a range of 5 with respect to the tire circumferential direction.

A pneumatic tire includes an inner-side cross belt and an outer-side cross belt forming belt angles of mutually different signs with the tire circumferential direction with absolute values from 46 to 80, inclusive; a circumferential reinforcing layer arranged between the inner-side cross belt and the outer-side cross belt and forming a belt angle of 5 with the tire circumferential direction; and a supplemental belt arranged outside the outer-side cross belt in the radial direction of the tire and forming a belt angle with the tire circumferential direction with an absolute value between 10 and 45 inclusive.