The present invention provides: a reinforcement member that includes a core material cord layer and a spiral cord layer including a reinforcement cord and arranged outside the core material cord layer, the reinforcement member being capable of improving tire longevity by suppressing breakage of the reinforcement cord due to fretting (wear) between a core material cord and the reinforcement cord; and a tire using the same. Provided are: a reinforcement member (1) that includes a core material layer (2) and a spiral cord layer (3) including a reinforcement cord (3a) spirally wound around the core material layer (2), in which the core material layer (2) includes a plate-like body made of a resin material having a chamfered end portion in a widthwise direction of the reinforcement member (1); and a tire using the same.

To provide a rubber compound for tires, a pneumatic tire and an airless tire capable of improving the steering stability of the tire while exerting excellent low fuel consumption performance. A rubber compound for tires characterized in that, of vulcanized rubber's physical properties, a complex elastic modulus E*.sub.70 (unit: MPa) and a loss tangent tan .sub.70 under initial strain of 10%, dynamic strain of 2% and temperature of 70 degrees C., satisfy 90<E*.sub.70<250, and E*.sub.70/tan .sub.70>800. A pneumatic tire provided with a rubber member made of the above-mentioned rubber compound. An airless tire provided with a rubber member made of the above-mentioned rubber compound. An airless tire provided in a tread ring with a shear rubber layer made of the above-mentioned rubber compound.

A tire 2 includes a reinforcing layer 20 located between a tread 4 and a carcass 12. The reinforcing layer 20 includes a band 38 and a belt 40. The band 38 includes a full band 42 and a pair of edge bands 44. The full band 42 has an end 42e located axially outward of a shoulder circumferential groove 28s. The belt 40 includes a third belt ply 46C located radially inward of the pair of edge bands 44. A distance Y between each edge band 44 and the full band 42 or the third belt ply 46C is not less than 2.2 mm and not greater than 4.0 mm. A ratio of a tire thickness E at an end PE of a tread surface 22 to a tire thickness D at an equator plane is not less than 1.2 and not greater than 2.0.

This pneumatic tire (1) includes: a pair of bead cores (11, 11); a carcass layer (13) extending between the pair of bead cores (11, 11); and a belt layer (14) including a laminate of at least four belt plies (141 to 144) having steel belt cords covered with coating rubber, the belt layer being disposed on the outer side in a tire radial direction of the carcass layer (13). An inter-cord distance (Ga) between an outermost layer belt ply (fourth belt (144)) and an adjacent belt ply (third belt (143)) has a relationship such that 0.80Ga/max1.80 with respect to a maximum value (max) of outer diameters (4, 3) of belt cords (1441, 1431) in the outermost layer belt ply (144) and the adjacent belt ply (143).

A wheel and tire assembly a plurality of includes support elements for supporting part of a load of a vehicle and an annular shear band extending circumferentially around the support elements. The shear band has a radially inner circumferential membrane, a radially outer circumferential membrane, and a shear layer interconnecting the inner membrane and the outer membrane for controlling shear deflection between the inner membrane and the outer membrane. The shear layer defines a connecting film layer radially sandwiched between a first radially inner, cylindrical flat film layer and a second radially outer, cylindrical film layer. The connecting film layer defines a periodic wave shape as the connecting film layer extends circumferentially between the first and second film layers.

Tire (1) for a vehicle, comprising a radially outermost working layer (41) which comprises at least one undulation (412) in line with a rib (26). The undulation (412) is such that it is radially on the outside of the points of the working layer (41) that are in line with the centre of the bottom face (243) of the circumferential groove (25) closest to the undulation (412) and that the minimum radial distance (do), between the radially outer surface of the radially outermost working layer (41) and the tread surface (21) is at least 1 mm less than the radial distance (dc) between the radially outer surface (ROS) of the radially outermost working layer (41) and the tread surface (21), which is the distance in line with the circumferential groove (25) closest to the undulation (412) concerned.

An air-less tire has, formed on a tread ring: tread rubber for forming a ground contact surface; an outer reinforcement cord layer provided nearest the tread rubber; an inner reinforcement cord layer provided inside the outer reinforcement cord layer in the radial direction of the tire; and a shear rubber layer provided between the outer reinforcement cord layer and the inner reinforcement cord layer. The outer reinforcement cord layer includes: a first cord layer having first cords arranged tilted relative to the circumferential direction of the tire; and a second cord layer provided outside the first cord layer in the radial direction of the tire and having second cords arranged tilted relative to the circumferential direction of the tire in the direction opposite the direction in which the first cords are tilted. The inner reinforcement cord layer includes a third cord layer having third cords arranged parallel to the circumferential direction or the axial direction of the tire.

An airless tire includes a tread ring having a cylindrical form and a ground contact surface, a hub positioned on radial direction inner side of the tread ring and formed to be fixed to an axle, and a spoke structure connecting the tread ring and hub. The tread ring includes a tread rubber layer forming the ground contact surface, and a reinforcing rubber layer formed on tire radial direction inner side of the tread layer, and the reinforcing layer is formed of a rubber material obtained by co-crosslinking a rubber composition including a rubber component, an , -unsaturated carboxylic acid metal salt and a peroxide such that the metal salt has amount in range of 10 to 80 parts by weight with respect to 100 parts by mass of the rubber component and the rubber component has content rate of butadiene rubber in range of 10 to 100% by mass.

An airless tire includes a tread ring, a hub and a spoke. The tread ring includes a tread rubber layer, a first reinforcing cord layer on radial direction inner side of the tread layer, a second reinforcing cord layer on radial direction inner side of the first cord layer, and a shear rubber layer between the cord layers, the cord layers have array layers including reinforcing cords, and topping rubber portions covering the array layers, each topping portion has an inner portion adjacent to the shear layer, and an outer portion, and the topping portion(s) has the inner portion formed of a composition including a rubber component which includes a butadiene rubber in content rate of 10 to 100% by mass, an , -unsaturated carboxylic acid metal salt in amount of 10 to 80 parts by weight with respect to 100 parts by mass of the component, and a peroxide.

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.