The tire has a radial carcass reinforcement and a crown reinforcement containing at least two working crown layers of reinforcing elements. The working crown layers are covered radially with a tread that is joined to two beads via two sidewalls. The relative density of sulfur bridges measured according to the equilibrium swelling method is less than 5% in at least 30% of the elastomer compounds present in the surface of at least one zone S in a meridian plane. The elastomer compounds are compositions based on at least one diene elastomer selected from the group of diene elastomers consisting of polybutadienes (abbreviated to BRs), synthetic polyisoprenes (IRs), natural rubber (NR), isoprene copolymers, butadiene copolymers with the exception of butadiene-nitrile copolymers (NBRs), apart from diene elastomers bearing carboxyl functions, and mixtures of these diene elastomers.

The tire includes a crown reinforcement which is formed of three working crown layers of reinforcing elements. The reinforcing elements of the two radially outermost working layers are crossed from one layer to the other, making with the circumferential direction angles of between 20 and 45 the circumferential direction, of the reinforcing elements of the radially innermost working layer being between 15 and 20. The reinforcing elements of the two radially innermost working layers are oriented in the same direction with respect to the circumferential direction. The difference between the angles of the reinforcing elements of the radially innermost working layers is greater than 10. The widths of the two radially outermost working layers are greater than the 0.7 times the width of the tread, and the width of the radially innermost working layer is strictly less than 0.7 times the width of the tread.

A tire includes a body ply extending from a first bead region to a second bead region and a conductive ply disposed radially above the body ply. The tire further includes a gum strip having a top end in contact with the conductive ply and a bottom end located in the first bead region.

A pneumatic tire includes a tread rubber region 5 a belt region 6 including a belt 61 and a contact patch pressure reducing rubber region 7, wherein tread rubber region 5 includes base rubber layer 51 and cap rubber layer 52. The two ends of the tread surface at shoulder lug 55 have first end 551 and a second end (not shown) which is located toward an interior in a tire width direction from first end 551. A contact patch pressure reducing rubber region 7 is disposed at a location between belt 61 and base nibber layer 51. The modulus of contact patch pressure reducing rubber region 7 is lower than the modulus of base rubber layer 51 and is lower than the modulus of cap rubber layer 52.

In a cross-sectional view of a pneumatic tire in the tire meridian direction, land sections, which are located on the inner side of left and right outermost circumferential main grooves in the tire width direction, have a first profile which protrudes outward in the tire radial direction. In addition, shoulder land sections, which are located on the outer side of the right and left outermost circumferential main grooves in the tire width direction, have a second profile which protrudes inward in the tire radial direction within a ground contact surface. In addition, the distance between a line extending from the first profile in the ground contact surface of the shoulder land section and the second profile in the tire radial direction increases toward the outer side in the tire width direction.

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.

Tire comprising a crown reinforcement formed of three working layers having between ends thereof two layers of rubber compound Ci. Thickness of the three working layers is <5 mm with individual metal wires as reinforcing elements of diameter <0.50 mm and a distance therebetween being strictly <1 mm. The axial width of each working layer is >60% that of the tread. Distance d.sub.i between two working layers separated by a layer of rubber compound Ci and measured at the end of the axially narrowest working layer in contact therewith is such that 0.5<d.sub.i<2.5 mm, and, in a meridian plane, the thickness of at least one layer of rubber compound Ci is substantially constant over the axial width between the axially inner end of a layer of rubber compound Ci and the end of the axially narrowest working layer in contact therewith.

A farm tire including a carcass; a tread supported by the carcass and having a number of lugs; a tread belt interposed between the carcass and the tread, and having an outer tread ply and an inner tread ply, which are superimposed and each have a number of metal cords embedded in a rubber strip; the tire. The farm tire also includes two tread ply wedges, each interposed between the lateral ends of the two tread plies; and protective caps covering the two ends of each of the tread plies, each made of rubber and folded into a U about the respective ply end; wherein the protective cap of the inner tread ply is partly defined by an outer appendix of the corresponding tread ply wedge.

The invention relates to a tire comprising a crown reinforcement formed of at least two working crown layers of reinforcing elements the ends of which are radially uncoupled by a polymer compound. According to the invention, the reinforcing elements of at least one working crown layer are metal cords with saturated layers, at least one internal layer being sheathed with a layer consisting of a polymer composition such as a rubber composition and in each of the shoulders of the tire, at least the uncoupling polymer compound in contact with the ends of at least two working crown layers exhibits, in the sorption test, a gas content lower than 0.06 m.sup.3.sub.STP/m.sup.3.sub.ML.

A tire for a heavy-duty vehicle of construction plant type comprises a crown reinforcement (35) radially on the inside of a tread (10) and radially on the outside of a carcass reinforcement (50). The crown reinforcement (35) comprises: at least one low-modulus layer (20) formed of elastic metal reinforcers having a structural elongation at least equal to 0.4%, and a total elongation at break at least equal to 3%, and a tensile elastic modulus of between 40 GPa and 130 GPa; at least one rigid layer (30) formed of rigid metal reinforcers, the structural elongation of which is less than or equal to 0.2% and the tensile elastic modulus of which is between 140 GPa and 200 GPa. The ratio of the breaking tension of the rigid layer to that of the low-modulus layer is greater than or equal to 1.2.