Tire comprising a crown reinforcement formed of at least two working crown layers of reinforcing elements, a first layer C of rubber compound being placed between at least the ends of the said at least two working crown layers, a second layer S of polymer compound being in contact with at least one working crown layer and in contact with the carcass reinforcement and the crown reinforcement comprising at least one layer of circumferential reinforcing elements. The elastic modulus under tension at 10% elongation of the first layer C is less than 8 MPa, the maximum tan() value, denoted tan().sub.max, of the first layer C is less than 0.100, and the complex dynamic shear modulus G*, measured at 10% and 60 C. on the return cycle, of the said second layer S of polymer compound is greater than 1.35 MPa.

A pneumatic tire comprises a tread portion provided with a band layer disposed radially inside a tread rubber provided with a first circumferential groove. Cords of the band layer are a hybrid cord formed by twisting together a first filament and a second filament having an elastic modulus lower than that of the first filament. In a region radially inside the first circumferential groove, a maximum thickness t1 of topping rubber on the radially outer side of the band cords is not more than 1.0 mm; a minimum distance d1 from the bottom of the first circumferential groove to the radially outer surface of the band layer is not more than 2.0 mm; and a distance d2 from a groove edge of the first circumferential groove to the radially outer surface of the band layer is not more than 15.0 mm.

A tire comprising a crown reinforcement formed of at least two working crown layers each one formed of reinforcing elements inserted between two skim layers of rubber compound, a first layer S of polymer compound being in contact with at least one working crown layer and in contact with the carcass reinforcement and the crown reinforcement comprising at least one layer of circumferential reinforcing elements. The elastic modulus under tension at 10% elongation of the layer C is greater than 9 MPa, the maximum value of tan(), denoted tan()max, of the layer C is less than 0.100 and the complex dynamic shear modulus G*, measured at 10% and 60 C. on the return cycle, of the first layer S of polymer compound is greater than 1.35 MPa.

Provided is a tire that is lightweight and excellent in riding characteristics while suppressing an increase in cost.

A plurality of belt layers 7 are superimposed in a radial direction. The belt layers 7 include a plurality of steel cords 10 arranged in parallel in a row and rubber 11. The steel cords 10 have a 14 structure in which four filaments 20 are twisted, and when a center-to-center distance between the steel cords 10 in at least two of the belt layers 7 adjacent in the radial direction is T, and an average diameter of virtual circumscribed circles of the steel cords 10 having the 14 structure is D, 1.25T/D2.25.

In a pneumatic tire, a belt layer is formed by laminating a pair of cross belts having a belt angle, as an absolute value, of not less than 10 and not greater than 45 and having belt angles of mutually opposite signs, and a circumferential reinforcing layer having a belt angle within a range of 5 with respect to the tire circumferential direction. Moreover, the distance (Gcc) from the tread profile to the tire inner circumferential surface along the tire equatorial plane and the distance (Gsh) from the tread edge to the tire inner circumferential surface have a relationship satisfying 1.10Gsh/Gcc.

A pneumatic tire is provided with at least three circumferential main grooves extending in a tire circumferential direction, and a plurality of land portions defined by the circumferential main grooves. The belt layer is formed by laminating a pair of cross belts having belt angles, as an absolute value, of not less than 10 and not greater than 45 and of mutually opposite signs, and a circumferential reinforcing layer having a belt angle within a range of 5 with respect to the tire circumferential direction. In a cross-sectional view in the tire meridian direction, the distance Dcc from the circumferential reinforcing layer to the terminal wear surface on a tire equatorial plane and the distance De from an end portion of the circumferential reinforcing layer to the terminal wear surface have the relationship such that De/Dcc0.94.

A tire comprising a tire frame that comprises a resin material and has a circular shape, and a metal-resin composite, the metal-resin composite having a structure in which a metal member, an adhesive layer and a resin layer are disposed in this order, and the adhesive layer comprising an acid-modified polypropylene and having a crystallinity of from 21% to 40%.

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.

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.

A tire may include: a tread cap; a carcass that comprises a radially outermost ply; a belt structure interposed between the carcass and the tread, the belt structure comprising a radially innermost belt; a pair of sidewall portions, wherein radially outermost portions of each sidewall overlie lateral end portions of the tread cap; a pair of bead regions, wherein the radially innermost belt wraps around the bead regions; a pair wraparound gum layers, wherein each wraparound gum layer wraps around a lateral end portion of the radially innermost belt; and a pair of sidewall gum layers that each extend along an outer surface of the radially outermost ply, wherein a first end of each sidewall gum layer is between the radially outermost ply and the lateral end portion of the radially innermost belt and a second end of each sidewall gum layer is at the bead region.