A tire having a radial carcass reinforcement, made up of a single layer of reinforcing elements anchored in each of the beads by being turned up around a bead wire, reinforced by a stiffener. The two working crown layers are the only ones present to form the crown reinforcement over at least 75% of the width of the tread, the absolute value of the difference between the absolute values of the angles α2 and α1 being greater than 8°, α2 being greater than α1 in terms of absolute value, the mean angle α satisfying the relationship 13+131*exp(−L/100)<α<20+164*exp(−L/100), the reinforcing elements of the carcass reinforcement being cords which, in the test referred to as the permeability test, yield a flow rate of less than 20 cm.sup.3/min, a rubber compound being present within the cords, and, in the sidewall of the tire, the profile of the outer surface of the tire is at a constant distance from the carcass reinforcement layer between the points F and A, and meets the outer surface of the bead at the point C, forming two successive circular arcs.

A pneumatic tire for use on trucks, the tire comprising a tread and a belt structure located radially inward of the tread, the belt structure including a pair of working belts, wherein the working belts are reinforced plies each comprising parallel reinforcement elements, wherein the angle of the reinforcement elements in the respective working belt ranges from 12 degrees to 35 degrees from the circumferential direction, wherein the belt structure further includes a low angle belt positioned between the working belts comprising parallel reinforcement elements angled at less than 5 degrees from the circumferential direction, and wherein the low angle belt has folded belt edges forming a first and second narrow belt at the lateral ends of the low angle belt, and wherein the first and second narrow belt are each positioned radially inward of an axially outermost groove on each side of the tread.

A non-pneumatic tire includes a tread; a shear band, and a connecting web positioned between a hub and the shear band. The shear band has a first and second membrane layer formed of a plurality of parallel reinforcement cords arranged at an angle of 10 degrees or less with respect to the tire equatorial plane, said o tread further comprises a first angled belt located radially outward of the second membrane layer, and a second angled belt located radially outward of the first angled belt, wherein the first and second angled belt each have parallel reinforcement cords having a belt angle in the range of 15-30 degrees with respect to the tire equatorial plane, and wherein the angle of the second angled belt has an angle equal and opposite direction of the belt angle of the first angled belt.

A non-pneumatic tire includes a shear band having a first membrane layer located radially inward of the outer annular tread, a second membrane layer located radially outward of the first membrane layer, wherein the first and second membrane layer are formed of a plurality of parallel reinforcement cords arranged at an angle of 10 degrees or less with respect to the tire equatorial plane, said outer annular tread further comprises a first angled belt located radially outward of the second membrane layer, and a second angled belt located radially outward of the first angled belt, wherein the first and second angled belt each have parallel reinforcement cords having a belt angle in the range of 15-30 degrees with respect to the tire equatorial plane, and wherein the angle of the second angled belt has an angle equal and opposite direction of the belt angle of the first angled belt.

A radial pneumatic tire for a heavy-duty civil engineering vehicle aims to reduce the risk of tread separation of the pneumatic tire, during driving on sharp rocks, while ensuring good resistance to cracking of the crown reinforcement. The pneumatic tire has a protective reinforcement with two protective layers, the radially innermost protective layer having elastic metal reinforcements with a diameter D1 which are axially distributed according to an axial pitch P1, and the radially outermost protective layer has elastic metal reinforcements with a diameter D2 which are axially distributed according to an axial pitch P2. In the tire the following relations are satisfied:
D1>D2
P1>P2
P1>=1.2*D1 and P2>=1.2*D2
2.5<=(D1*P1)/(D2*P2)<=5.

A method for manufacturing a tire comprising a carcass reinforcement comprising a carcass layer and a working reinforcement comprising a single working layer comprising forming, around a support, a wound carcass assembly (52) intended to form the carcass layer and a wound working assembly intended to form the working layer, and then deforming the support. The wound carcass assembly (52) is formed so as to form either a junction (56) by abutment without forming a superposition, or a junction (56) by overlapping, or without forming a junction.

A tire includes a belt layer in a tread portion. The belt layer includes at least one belt ply. The belt ply includes a plurality of belt cords including a steel single wire having a flat cross-sectional shape. In at least one of the belt cords, the steel single wire has a short diameter direction inclined at an angle θ of less than 90 degrees with respect to a thickness direction of the belt ply.

A pneumatic tire for use on trucks, the tire comprising a tread and a belt structure located radially inward of the tread, the belt structure including a pair of working belts, wherein the working belts are reinforced plies each comprising parallel reinforcement elements, wherein the angle of the reinforcement elements in the respective working belt ranges from 12 degrees to 35 degrees from the circumferential direction, wherein the belt structure further includes a low angle belt positioned between the working belts comprising parallel reinforcement elements angled at less than 5 degrees from the circumferential direction, and wherein a first and second narrow belt is positioned on the lateral ends of the low angle belt, and wherein the first and second narrow belt are each positioned radially inward of an axially outermost groove on each side of the tread.

A pneumatic tire for use on trucks, the tire comprising: a tread which includes a belt reinforcement structure of only three belts, the belt structure including a pair of working belts, wherein the angle of the working belts range from about 10 degrees to about 50 degrees, wherein a zigzag or low angle belt is positioned preferably between the working belts or radially inward of the working belts. The belt structure further includes a rubber strip located between the radially innermost belt and the tire carcass, and preferably has a gauge that varies across the axial width of the tire.

A pneumatic tire includes a tread portion, and a belt layer including a plurality of belt plies on an inner side in a tire radial direction of the tread portion. In such a pneumatic tire, a mounting direction of the pneumatic tire on a vehicle is specified; the belt layer includes a circumferential reinforcing layer, circumferential reinforcing layer cords being disposed side by side in a tire width direction in the circumferential reinforcing layer, the circumferential reinforcing layer cords being inclined with respect to a tire circumferential direction within a range of ±5° in the tire width direction; and a cord count, namely a number of the circumferential reinforcing layer cords in the tire width direction, of the circumferential reinforcing layer is greater on an inner side in a vehicle mounting direction than on an outer side in the vehicle mounting direction, based on a tire equatorial plane.