A heavy duty tire is disclosed. The distance from the radially outer surface of a belt layer to the tire's inner surface is 15 to 23 mm when measured along a tire radial direction line passing through the bottom of a shoulder main groove. The width of the shoulder main groove is more than the width of a center main groove. The ratio Wc:Wm:Ws of the average width Wc of a center land portion, the average width Wm of a middle land portion, and the average width Ws of a shoulder land portion is 1.00:1.00 to 1.08:1.03 to 1.13. The middle land portion is provided with a plurality of middle axial grooves. The shoulder land portion is provided with a plurality of shoulder axial grooves. The width of the shoulder axial groove is more than the width of the middle axial groove. The angle θs of the shoulder axial groove is more than the angle θm of the middle axial groove with respect to the tire axial direction.

In a process for building tires, a carcass structure which includes at least one carcass ply and a belt structure, is formed. Manufacture of the belt structure includes: forming a first portion of at least one cushion insert through spiralling of a continuous elongated element; forming at least one first belt layer in a radially external position to the first portion in such a manner that the first portion axially projects from one of the axially opposite side edges of the first belt layer, forming a second portion of the cushion insert through spiralling of a continuous elongated element in a radially external position to the side edge of the first belt layer and to a stretch of the first portion projecting from the side edge itself, so as to enclose the side edge between the first and second portions of the cushion insert.

The pneumatic tire according to the disclosure includes a resin-coated belt comprising a wire coated with a coating resin. A base ring is formed at a tire radial inside of the resin-coated belt, while being in contact with a tire widthwise outer end of the resin-coated belt. A concavo-convex portion is formed on at least one of surfaces of the base ring.

A pneumatic tire according to an embodiment is a pneumatic tire including a belt pad disposed between a belt end and a carcass ply. The belt pad is formed by a rubber composition containing 1 to 10 parts by mass of sulfur, 0.1 to 5 parts by mass of N,N-dibenzylbenzothiazole-2-sulfenamide, and 0.1 to 5 parts by mass of either one or both of 1,6-bis(N,N-dibenzylthiocarbamoyldithio)hexane and hexamethylene bis-thiosulfate disodium salt dihydrate, with respect to 100 parts by mass of diene rubber.

A pneumatic tire includes a pair of bead cores; a pair of bead fillers that are connected to the pair of bead cores; a carcass ply that is suspended between the pair of bead cores; a side wall rubber that is arranged on a tire-outer-surface-side of the carcass ply and constitutes a tire outer surface; a chafer layer that is turned from a tire-inner-surface-side to the tire-outer-surface-side around the bead cores and the bead fillers and rolled up on an outer surface of the carcass ply; and a pair of support rubbers that are located between the side wall rubber and the carcass ply and arranged so as to hold a rolled-up end of the chafer layer from both sides in a tire width direction. A modulus values of the pair of support rubbers are higher than a modulus value of the side wall rubber.

A tire can include a pair of beads, a carcass, an inner liner, and an insulation located between the carcass and the inner liner. The carcass can include one carcass ply. The carcass ply can include a plurality of carcass cords and a topping rubber. Each carcass cord can have a total fineness of not less than 6000 dtex and not greater than 9000 dtex. The insulation can be located between first and second beads. A ratio (ta/td) of a thickness to of the topping rubber located between the insulation and the carcass cords to a thickness td of the insulation can be not less than 0.2 and not greater than 0.6.

The environmental footprint of a tire for a construction plant vehicle is improved. To do so, the elastomer compounds derived from non-fossil resources represent a mass content greater than or equal to 65% of the total mass of the compounds of the tire, at least 75% of the total mass of the compounds of the tire is made up of elastomer compounds each of which has a viscoelastic loss, measured in terms of tan(δ), less than or equal to 0.065, and an electrical resistivity greater than or equal to 1E+10 ‘Ω.Math.cm.

A tire comprises a tread reinforcing layer comprising a cord-reinforced part formed by winding a rubberized cord strip with at least one reinforcing cord covered with a topping rubber. The cord-reinforced part includes a mesh part in which first inclined segments and second inclined segments of the rubberized cord strip are inclined to opposite directions with respect to the tire circumferential direction. The first inclined segments intersect the second inclined segments, leaving space parts each having a quadrilateral shape. The mesh part has a tire-equator-side first region, a tread-edge-side second region and a third region therebetween, wherein the space parts within the tire-equator-side first region each have an area A1, the space parts within the tread-edge-side second region each have an area A2, and the space parts within the third region each have an area A3 which is smaller than the area A1 and larger than the area A2.

A pneumatic tire is described which includes a tread, a carcass and a belt structure interposed between the carcass and the tread. The belt structure includes a first and second working belt, wherein the angle of the working belts range from about 12 degrees to about 30 degrees, wherein the belt structure further includes a low angle belt located between the working belts. The first working belt is the radially innermost belt, and is the widest belt. The second working belt is radially outward of the low angle belt, and has first and second lateral ends that are located adjacent first and second lateral belts. The first and second lateral belts are low angle belts. The pneumatic tire may further include an optional third working belt, that is the radially outermost belt.

A pneumatic tire includes a tread portion, sidewall portions, bead cores, an inner member including side portions and being continuous between the bead cores, a discontinuous ply disposed on an outer side in a tire radial direction of the inner member, and including ply pieces each having an inner end portion disposed in the tread portion, a side portion, and a winding portion wound up on the bead cores, a belt covering inner ends portion of the ply from the outer side in the tire radial direction, first joining members arranged between the inner end portions of the ply pieces and the inner member, and a pair of second joining members arranged between the inner end portions of the ply pieces and the belt, and each including an extending portion extending toward an outer side in a tire width direction beyond an end portion of the belt.