A pneumatic tire includes a tread portion, carcass, inclined belt, and circumferential belt. The inclined belt is formed by inclined belt layer(s) including cords inclined relative to the tire circumferential direction. A circumferential main groove is provided in the tread portion. The inclined belt includes a high-angle inclined belt layer in which the cords are at an inclination angle of 35 to 90 relative to the tire circumferential direction. In at least one tread half portion, an edge of the high-angle inclined belt layer in the tire width direction is positioned further outward in the tire width direction than the circumferential main groove disposed furthest outward in the tire width direction. The interval in the tire width direction from the edge to the center of the circumferential main groove is 0.2W.sub.1 to 0.35W.sub.1, where W.sub.1 is the width of the high-angle inclined belt layer in the tire width direction.

To reduce noise while suppressing increase in rolling resistance, without affecting the formation of a carcass line, provided is a pneumatic tire (10) including: a carcass (13); an inclined belt (14), and an inner liner (17). The inclined belt (14) is disposed on the tire radial outer side of the crown portion of the carcass (13). The inclined belt (14) includes at least one inclined belt layer (16). The inclined belt layer (16) has cords extending as being inclined at 35 or more with respect to the tire circumferential direction. The inner liner (17) has a thickness of 1.5 mm or more at least in part of a side portion (19).

A pneumatic tire is provided with an outside reinforcing belt provided in the tire radial direction outside rather than crossing belts and covering a plurality of reinforcing cords extended along the tire width direction and the tire radial direction and arranged at a predetermined distance from each other, and an inside reinforcing belt 55 provided in the tire radial direction inside of a carcass and covering a plurality of reinforcing cords extended along the tire width direction and the tire radial direction and arranged at a predetermined distance from each other.

A pneumatic tire comprises a tread in contact with a road surface and a pair of inclined belts with crossing cords. A volume of the groove portion formed on the tread of inside when mounted to the vehicle based on a tire equatorial line being less than volume of the groove portion formed on the tread of outside when mounted to the vehicle based on the tire equatorial line, and the pneumatic tire is provided with a reinforcing belt covering a plurality of reinforcing cords extending in the tire width direction and along tire radial direction and arranged at a predetermined distance between the inclined belts and the tread. The reinforcing belt extends from the outside when mounted to the vehicle to the inside when mounted to the vehicle.

A tire comprising a crown reinforcement formed of at least two working crown layers of reinforcing elements. The tire additionally comprises, in each shoulder, at least one end of a layer of reinforcing elements that are mutually parallel in the layer and are oriented circumferentially, said end being axially outside said at least two working crown layers, the reinforcing elements of the carcass reinforcement having a diameter less than 1 mm and being made up of threads with a diameter strictly greater than 0.16 mm, and said reinforcing elements of the carcass reinforcement being advantageously non-wrapped metal cords that return a flow rate of less than 20 cm.sup.3/min in what is referred to as the permeability test.

A tire 2 includes: a tread 4 forming a tread surface 20; a band 14 disposed inward of the tread 4 in a radial direction; and a belt 12 disposed between the tread 4 and the band 14 in the radial direction. The tread 4 includes a center region 22 disposed at a center in an axial direction, and a shoulder region 24 disposed on an outer side in the axial direction. The band 14 includes a band cord. The band cord is helically wound and extends in a circumferential direction. The belt 12 includes a belt cord. The belt cord extends so as to be tilted relative to an equator plane. An absolute value of an angle of the belt cord relative to the equator plane is not less than 70 and not greater than 90.

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)/A1.15 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, 0.75Q/C0.95 is satisfied.

On a pneumatic tire are defined a first imaginary line VL1 passing through a ground contact surface in a meridian cross section of a tread portion, a second imaginary line VL2 passing through a bottom portion of a shoulder main groove and parallel to VL1, an intersection point P between VL2 and a surface of a shoulder land portion outward from a ground contact edge in a lateral direction, and an equatorial plane CL. 0.80(B+C)/A1.15 is satisfied, where A represents a distance in the lateral direction between P and CL, B represents a depth of the shoulder main groove, and C represents a distance in the lateral direction between the ground contact edge and CL. 0.75S/A0.95 is satisfied, where S represents a distance in the lateral direction between CL and an end portion of a longest belt ply in the lateral direction.

In a pneumatic tire are defined: a first line VL1 passing through a ground contact surface in a cross-section of a tread, a second line VL2 passing through a bottom of a shoulder groove and parallel to VL1, an intersection P between tVL2 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 depth of the shoulder groove, and C as a distance between T and CL, 0.80(B+C)/A1.15 is satisfied. Given J as an outer diameter in the equatorial plane, K as an outer diameter of an opening end inward of the shoulder groove, and L as an outer diameter at T, 0.05(KL)/(JL)0.85 is satisfied.

A pneumatic tire is provided with a tread portion and side portions. The tread portion includes shoulder main grooves and shoulder land portions. The following are defined in a meridian cross section of the tread portion: a first imaginary line passing through a ground contact surface, a second imaginary line passing through a bottom portion of a shoulder main groove and parallel to the first imaginary line, an intersection point between the second imaginary line and a surface of a shoulder land portion, and a tire equatorial plane. Given A as a distance in the tire lateral direction between the intersection point and the tire equatorial plane, B as a groove depth of the shoulder main groove, and C as a distance in the tire lateral direction between the tire equatorial plane and the ground contact edge, the condition 0.80(B+C)/A1.15 is satisfied.