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 0.82≤TW/Wca≤0.92. A width Ws of the circumferential reinforcing layer and a cross-sectional width Wca of the carcass layer such that 0.60≤Ws/Wca≤0.70.

Passenger vehicle tire, the tread having edge parts (11), provided with a plurality of transversely or obliquely oriented cuts (3) having a width at most equal to 2 mm and a depth at least equal to 75% of the thickness of the tread that is intended to be worn away, more than half of the cuts (3) comprising a protuberance that locally reduces the width of the cut (3) to a width at least equal to 0.2 mm and at most equal to 0.5 mm. The tread material which comes into contact with the road surface in the new state has a Shore A hardness at least equal to 48 and at most equal to 57, a loss at 60° C. at least equal to 12% and at most equal to 20%, a glass transition temperature Tg at least equal to −20° C. and at most equal to −10° C.

The present invention provides a tire that uses an elastomer-metal cord composite, which composite is obtained by coating metal cords with an elastomer, each metal cord being composed of a bundle of metal filaments arranged without being twisted, and which composite is capable of highly improving the performance of the tire. The above described tire is one including a belt (105) which includes at least two belt layers (105a) and (105b). In this tire, the belt layers (105a) and (105b) are each obtained by coating metal cords (2) with an elastomer (3), each metal cord (2) being composed of a bundle of a plurality of metal filaments (1) arranged in a row without being twisted; at least one pair of adjacent metal filaments in the metal cord (2) differ in at least one of the amount of shaping and shaping pitch; each of the belt layers (105a) and (105b) has a thickness t1 of more than 0.30 mm and less than 1.00 mm; and the distance g in the tire radial direction between the metal cords (2) in the two adjacent belt layers (105a) and (105b) is 0.10 mm or more and 1.20 mm or less at the center of the tire.

In a pneumatic tire are defined: a first imaginary line VL1 passing through a ground contact surface in a meridian cross section of a tread, a second imaginary line VL2 passing through a bottom of a shoulder groove and parallel to VL1, an intersection point P between VL2 and a surface of a shoulder land outward of a ground contact edge T in a lateral direction, and an equatorial plane CL. Given A as a distance in the lateral direction between P and CL, B as a groove depth of the shoulder groove, and C as a distance in the lateral direction between T and CL, 0.80≤(B+C)/A≤1.15 is satisfied. Given Q as a distance in the lateral direction between CL and an end of a belt ply that has a shorter dimension in the lateral direction, 0.75≤Q/C≤0.95 is satisfied.

A plurality of belt layers 7 are superimposed in a radial direction. The belt layers 7 include a plurality of steel cords 10 arranged in parallel in a row and rubber 11. The steel cords 10 have a 1×4 structure in which four filaments 20 are twisted, and when a center-to-center distance between the steel cords 10 in at least two of the belt layers 7 adjacent in the radial direction is T, and an average diameter of virtual circumscribed circles of the steel cords 10 having the 1×4 structure is D, 1.25≤T/D≤2.25.

Provided is a pneumatic tire with which any change in steering stability between low-speed running and high-speed running is sufficiently minimized, and durability is also sufficiently improved. This pneumatic tire has a belt layer radially inward of the tread portion, wherein the ratio (tan δ/E*) of the loss tangent (tan δ) to the complex elastic modulus E*(MPa) of the rubber composition constituting the belt layer, as measured under the conditions of 70° C., frequency 10 Hz, initial distortion 5%, and dynamic distortion rate 1%, is 0.002 to 0.017 (inclusive), and the (formula 1) and (formula 2) are satisfied, where Wt (mm) is the cross-sectional width of the tire, Dt (mm) is the outside diameter, and the virtual volume V (mm.sup.3) is the volume of the space occupied by the tire, when the tire is installed on a standardized rim and the internal pressure is 250 kPa.

1700≤(Dt.sup.2×π/4)/Wt≤2827.4  (formula 1)

[(V+1.5×10.sup.7)/Wt]≤2.88×10.sup.5  (formula 2)

A pneumatic tire comprises a carcass layer, a belt layer disposed on the outer side in the tire radial direction of the carcass layer, and tread rubber disposed on the outer side in the tire radial direction of the belt layer. The belt layer is formed by laminating a pair of cross belts having belt angles with an absolute value from 10° to 45° both inclusive and mutually opposite signs, and a circumferential reinforcing layer having a belt angle within a range of ±5° relative to the tire circumferential direction. The distance (Gcc) from the tread profile to the tire inner circumferential surface along the tire equatorial plane and the distance (Gsh) from the tread edge to the tire inner circumferential surface have a relationship satisfying 1.10≤Gsh/Gcc. The groove depth (Dsh) and under-groove gauge (UDsh) of the outermost circumferential main groove have a relationship satisfying 0.20≤UDsh/Dsh.

A pneumatic tire comprises a carcass layer, a belt layer radially outward of the carcass layer, and a tread rubber radially outward of the belt layer. The belt layer includes 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 reinforcing layer having a belt angle within ±5° relative to a circumferential direction. A width Ws of the reinforcing layer and a cross-sectional width Wca of the carcass layer satisfy 0.60≤Ws/Wca≤0.70. The cross belts are radially outward of the large angle belt. The reinforcing layer is radially outward of the pair of cross belts. A width Wb2 of a wider cross belt of the pair and Wca satisfy 0.79≤Wb2/Wca≤0.89.

The present invention is directed to an article of manufacture, in one case a pneumatic tire. having at least one cord-reinforced rubber component comprising (A) a reinforcing cord; and (B) a rubber composition contacting the cord, the rubber composition comprising (1) from 70 to 100 phr of at least one polyisoprene rubber selected from the group consisting of natural rubber or synthetic polyisoprene; (2) from 0 to 30 phr of at least one additional rubber selected from the group consisting of polybutadiene and styrene-butadiene rubber; (3) from 20 to 80 phr of carbon black; (4) from 2 to 10 phr of silica; (5) from 0 to 1 phr of a cobalt salt; and (6) from 0.5 to 5 phr of N, N′-m-phenylene bismaleimide; wherein the rubber composition excludes resins and silane coupling agents.

The tire comprises a crown reinforcing zone comprising a ply of strips, each forming an angle of less than or equal to 10° with the circumferential direction. Each reinforcing strip is formed by a laminate made up of n inner composite layers comprising low-modulus oriented fibres parallel to each other, the angle of which with the circumferential direction is, in absolute terms, less than or equal to 10°, together with m outer composite layers on either side of the inner composite layers, comprising high-modulus oriented fibres parallel to each other, the angle of which with the circumferential direction is, in absolute terms, strictly greater than 10°. The high- and low-modulus fibres are coated with a polymer matrix.