A tire (1) in which at least one of the said tread pattern blocks (51) comprises a circumferential reinforcing element (52) positioned axially on the inside relative to the said at least one groove (71) when working from the outside towards the inside and axially close to the said circumferential groove, the circumferential reinforcing element (52) is made of a rubber compound having a dynamic shear modulus G* at least twice as high as the dynamic shear modulus G* of the rubber compound of the rest of the blocks of the tread, the circumferential reinforcing element (52) extends radially from the radially exterior surface of the said crown reinforcement (6) towards the surface of the said tread with an axial width which decreases progressively with increasing radial proximity to the outside, and in which the said circumferential reinforcing element (52) partially forms the axially internal lateral face (7i) of the said at least one of the said tread pattern blocks (51).

A tire for a vehicle comprises a tread (2), of which the central part of the tread (2) comprises at least two rubber compounds (221, 222), making up at least 90% of its volume. The first compound (221) is radially on the outside of the second compound (222) and makes up at least 40% and at most 60% of the volume of the central part. The second rubber compound (222) has a Shore hardness DS2 at least equal to 5 plus the Shore hardness DS1 of the first compound (221) and dynamic losses at a temperature of 0° C. and 23° C. that are at least equal to those of the first rubber compound (221). The axially outer parts of the tread are made up of a third compound (223) capable of touching the ground, having a stiffness and a hysteresis that are lower than those of the first compound.

A tire having a contact face of a width TW is provided. The contact face is intended to come into contact with ground during rolling. The tread is provided with at least one groove of a depth D provided with a wear indicating means that extends generally in a circumferential orientation and opens to the contact face. The tread comprises a center region and a pair of shoulder regions that are positioned on two axial sides of the center region. The shoulder regions each comprise a shoulder rubber layer of a thickness ts made of a shoulder rubber composition different from a rubber composition constituting the tread. A shear storage modulus G′ of the shoulder rubber composition measured at 23° C., 10 Hz and 10% of strain is less than or equal to 1.0 MPa.

The tire includes a tread that has a contact face of a width TW and is provided with a groove of a depth D. The tread has a center region and a pair of shoulder regions. The shoulder regions each have a shoulder rubber layer of a thickness is made of a shoulder rubber composition. A shear storage modulus G′ of the shoulder rubber composition is less than or equal to 1.0 MPa. The tire also has a cap ply whose cable extends generally in circumferential orientation and is positioned radially inbetween the tread and the ply at least in a region corresponding to the shoulder regions of the tread and the ply. A force F.sub.5% of the cap ply is greater than 900 N per 10 mm of a cap ply width under 5% strain in a direction cable of the cap ply is extending.

In a tire, a tread includes a cap layer forming a part of an outer surface of the tire, a base layer disposed inwardly of the cap layer in a radial direction, and an intermediate layer disposed between the cap layer and the base layer in the radial direction. A loss tangent of the intermediate layer at 30° C. is less than a loss tangent of the cap layer at 30° C. and a loss tangent of the base layer at 30° C. is less than the loss tangent of the intermediate layer at 30° C. The tread includes at least two three-layer body portions formed of the cap layer, the intermediate layer, and the base layer, and at least one two-layer body portion that is formed of the cap layer and the base layer and disposed between a first three-layer body portion and a second three-layer body portion.

The invention provides for a heavy truck tire having a sub-casing, a belt package and a rubber tread, the tread comprising a center zone separating two shoulder zones. The upper shoulder layer consisting of an upper shoulder rubber compound being different from a lower shoulder rubber compound, wherein: the upper shoulder rubber compound has a G*50 of at least 1.3 Mpa and a max tan(δ) of at least 0.12; the lower shoulder rubber compound has a max tan(δ) not greater than the max tan(δ) of a center rubber compound in the center zone being intended to come into contact with the ground; and the center rubber compound has a max tan(δ) of at most 0.09.

A tire with a radial carcass reinforcement, having a crown reinforcement, itself capped radially by a tread connected to two beads by two sidewalls, the tread having at least two layers of blended elastomeric compounds that are radially superposed and have a voids ratio that is lower in the central part than at the axially outer parts. A first layer of blended elastomeric compounds of the tread is made up of a first blended elastomeric compound forming a part extending at least into the region of the equatorial plane and of at least two axially outer parts formed of a second blended elastomeric compound, the first blended elastomeric compound having a macro dispersion Z-value higher than 65 and a maximum tan(δ) value, denoted tan(δ)max, lower than 0.120, and the complex dynamic shear modulus G* 1% at 100° C. of the second blended elastomeric compound having a value at least 10% higher than that of the complex dynamic shear modulus G* 1% at 100° C. of the first blended elastomeric compound.

A tire with a radial carcass reinforcement, having a crown reinforcement, itself capped radially by a tread connected to two beads by two sidewalls, the tread containing at least two layers of blended elastomeric compounds that are radially superposed and have a voids ratio that is lower in the central part than at the axially outer parts. A first layer of blended elastomeric compounds of the tread is made up of a first blended elastomeric compound forming a part extending at least into the region of the equatorial plane and of at least two axially outer parts formed of a second blended elastomeric compound, the first blended elastomeric compound having a macro dispersion Z-value higher than 65 and a maximum tan(δ) value, denoted tan(δ)max, lower than 0.150, and the elongation at break in a tearability test of the second blended elastomeric compound at 100° C. having a value at least 10% higher than that of the elongation at break of the first blended elastomeric compound in a tearability test at 100° C.

The invention relates to pneumatic tires having treads of a cap/base configuration where the outer tread cap rubber layer contains lugs with intervening grooves which extend to the running surface of the tread cap and wherein at least one of said grooves is contained in a rubber block within the tread. For this invention, the tread groove-containing rubber block joins the tire carcass and extends radially outward through the tread base rubber layer and into the outer tread cap rubber layer.

An object of the present disclosure is to provide a pneumatic tire for heavy load having improved fuel efficiency and rib tear resistance. Provided is a pneumatic tire for heavy load comprising a tread, wherein the pneumatic tire has a difference in modulus at 200% elongation between a base rubber layer and a cap rubber layer is set within a predetermined range and an acetone extraction amount of the base rubber layer is set within a predetermined range.