Abstract: A pneumatic tire includes a tread portion, carcass, inclined belt, and circumferential belt. The inclined belt is formed by inclined belt layer(s) including cords inclined relative to the tire circumferential direction. A circumferential main groove is provided in the tread portion. The inclined belt includes a high-angle inclined belt layer in which the cords are at an inclination angle of 35° to 90° relative to the tire circumferential direction. In at least one tread half portion, an edge of the high-angle inclined belt layer in the tire width direction is positioned further outward in the tire width direction than the circumferential main groove disposed furthest outward in the tire width direction. The interval in the tire width direction from the edge to the center of the circumferential main groove is 0.2W1 to 0.35W1, where W1 is the width of the high-angle inclined belt layer in the tire width direction.

Abstract: A pneumatic tire that makes steering stability, rolling resistance performance, and noise performance compatible includes a carcass toroidally extending between two bead portions; an inclined belt, with inclined belt layer(s) including cords that extend at an inclination relative to a tire circumferential direction, and a circumferential belt, with circumferential belt layer(s) including cords that extend along the tire circumferential direction, radially at an outer side of a crown portion of the carcass; and a tread at an outer side of the circumferential belt in the tire radial direction. An inclination angle of the cords in the inclined belt layers is 35° to 90°, the circumferential belt has a higher tire circumferential direction rigidity per unit width in a central region including a tire equator than in other regions, and in a surface region including the tire equator, the tread includes a land portion continuous in the tire circumferential direction.

Abstract: A tire comprising: a carcass; and inclined belt layers and a circumferential belt layer, wherein: the circumferential belt layer satisfies a correlation that X?750 when it is defined that X=Y×n×m, where Y is a Young's modulus in GPa of the cords forming the circumferential belt layer, n is a number of the cords implanted per 50 mm of width, and m is a number of layers of the circumferential belt layer; the inclined belt layers comprise at least two inclined belt layers having different tire widthwise widths; and a tire widthwise width W1 of an inclined belt layer having a widest width and a tire widthwise width W2 of an inclined belt layer having a narrowest width satisfy a correlation that W2?0.6 W1.

Abstract: A pneumatic radial tire for a passenger vehicle according to the present invention has an appropriate relationship between a tire cross-sectional width SW and a tire outer diameter OD. Also, a method of using the pneumatic radial tire for a passenger vehicle according to the present invention is to use the above radial tire with at least specified internal pressure.

Abstract: A pneumatic radial tire for a passenger vehicle according to the present invention has an appropriate relationship between a tire cross-sectional width SW and a tire outer diameter OD. Also, a method of using the pneumatic radial tire for a passenger vehicle according to the present invention is to use the above radial tire with at least specified internal pressure.

Abstract: The pneumatic radial tire for passenger cars according to the present invention specifies the ratio W/L between the section width W and outside diameter L and includes a width direction groove located at an appropriate position on the tread surface.

Abstract: A tire (T) for measurement, having applied thereto a required camber angle (CA) and slip angle (SA), is contacted against a rotatably driven rotating drum (1) having embedded therein a three-component force sensor (measurement unit 3) capable of measuring ground contact pressure (P), width direction shear stress (?x), and circumferential shear stress (?y) (properties) of the tire (T). The rotating drum (1) and tire (T) are rotated and the tire (T) is passed over the three-component force sensor (3) multiple times. The tire (T) properties are measured multiple times, and the tire circumferential direction position of each measurement point is identified. A ground contact pressure distribution, width direction shear stress distribution, and circumferential shear stress distribution in a contact region of the tire (T) with the rotating drum (1) are obtained by repeating measurement and identification while displacing the tire (T) along the rotation axis of the rotating drum (1).

Abstract: The present invention provides a pneumatic radial tire for a passenger vehicle, having: a cross sectional width SW and an outer diameter OD controlled under an appropriate SW-OD relationship; and an optimized configuration of a crown portion thereof.

Abstract: Provided is a pneumatic radial tire for a passenger vehicle, including: a carcass constituted of plies as radially-disposed cords and toroidally provided across a pair of bead portions; and a tread, in which: the tread surface has one or more grooves formed thereon; the grooves each have a groove width of 3 mm or less; and a section width SW to an outer diameter OD of the tire have a ratio of SW/OD?0.26 when SW<165 (mm), and SW and OD satisfy a relationship formula OD?2.035×SW+282.3 when SW?165 (mm).

Abstract: An object of the present invention is to adequately control relationship between a cross sectional width SW and an outer diameter OD of a pneumatic radial tire for a passenger vehicle. Specifically, a ground contact surface 1 of the tread of the pneumatic radial tire for a passenger car of the present invention is provided with either, as a groove, only at least one main groove 2a extending in the tread circumferential direction or, as grooves, only the main groove 2a and at least one auxiliary groove 2b other than the main groove, wherein the auxiliary groove has a groove width?2 mm in a tread widthwise region and a negative ratio of the main groove 2a is in the range of 12% to 20% (inclusive of 12% and 20%).

Abstract: An object of the present invention is to adequately control relationship between a cross sectional width SW and an outer diameter OD of a pneumatic radial tire for a passenger vehicle. The tire is further characterized in that, provided that each half portion in the tire width direction of a ground contact surface of the tire is divided in the tire width direction into three equal portions including a tire-width-direction center portion, a tire-width-direction intermediate portion and a tire-width-direction outer portion from the tire-width-direction center side, rigidity in the tire circumferential direction of the belt reinforcing layer in a region in the tire width direction thereof corresponding to the tire-width-direction outer side portion is lower than rigidity in the tire circumferential direction of the belt reinforcing layer in a region in the tire width direction thereof corresponding to the tire-width-direction center portion.

Abstract: A pneumatic radial tire for a passenger vehicle according to the present invention has an appropriate relationship between a tire cross-sectional width SW and a tire outer diameter OD. Also, a method of using the pneumatic radial tire for a passenger vehicle according to the present invention is to use the above radial tire with at least specified internal pressure.

Abstract: Provided is a pneumatic radial tire for a passenger vehicle, having a carcass, and including a belt and a tread disposed on the outside of the carcass, in which: a section width SW and an outer diameter OD of the tire have a ratio of SW/OD?0.26 when SW<165 (mm), and SW and OD satisfy a relationship formula OD?2.035×SW+282.3 when SW?165 (mm); and provided that V1 represents a volume of rubber lying inside than the both ends of a maximum-width belt layer having a maximum width among the belt layers while lying outside than the reinforcing member which is the outermost layer of the belt layers at the center position in the tire width direction, and that V2 represents a total volume of all the grooves formed in a surface of the tread, V1 and V2 has a ratio V2/V1?20%.

Abstract: The present invention provides: a pneumatic radial tire for a passenger car, the tire having cross sectional width SW and outer diameter OD satisfying a predetermined relationship formula when the tire is assembled with a rim and inflated at internal pressure of at least 250 kPa; a tire-rim assembly formed by assembling bead portions of said tire with the rim; and a method for using a tire, including preparing a pneumatic radial tire for a passenger car in which cross sectional width SW and outer diameter OD of the tire satisfy a predetermined relationship formula, and using the tire at internal pressure of at least 250 kPa.

Abstract: The pneumatic radial tire for passenger cars according to the present invention specifies the ratio W/L between the section width W and outside diameter L and includes a width direction groove located at an appropriate position on the tread surface.

Abstract: A pneumatic radial tire for a passenger vehicle has a ratio W/L where W is a cross-sectional width and L is an outer diameter. The tire also has a belt-reinforcing layer having a high rigidity and disposed between a belt and a tread.

Abstract: A run-flat tire of the present invention is a pneumatic radial tire for passenger vehicles which has a carcass composed of plies of radially arranged cords toroidally extending between a pair of bead portions, and the a W/L ratio of the section width W to the outer diameter L of the tire is 0.25 or less.

Abstract: The ride comfort and driving performance of a pneumatic tire 11 are improved while maintaining the high-speed durability and steering stability, in which an inclination angle A of steel cords 26, 27 in all belt plies 24, 25 constituting a belt layer 23 is not less than 45° with respect to an equator S of the tire, and a belt reinforcing layer 35 embedded with reinforcing cords substantially in parallel to the equator S is arranged between a belt layer 23 and a carcass layer 18, whereby an out-of-plane bending rigidity of the belt layer 23 in a circumferential direction can be lowered to make a longitudinal spring constant of the pneumatic tire 11 and uniformize the diameter of the belt reinforcing layer 35, and further a deformation amount of a tread portion 15 having a high bending rigidity can be made small.

Abstract: The present invention is to provide a pneumatic tire in which a belt angle is optimized to improve the transversal rigidity of a tire while keeping the circumferential rigidity, thereby exerting a higher cornering performance and straight-running stability even when a side force is applied in the high-speed running. A tire 1 has a pair of bead portions 2; a pair of sidewall portions 3 extending outward from the bead portion 2 in the tire's radial direction; a tread portion 4 extending between the both sidewall portions 3; and a carcass 6 having two plies 5a, 5b extending toroidally over the bead portions 2, sidewall portions 3 and tread portion 4. The tire 1 also has a main belt 9 interposed between a crown portion 7 of the carcass 6 and the tread portion 4. The main belt 9 has two belt layers 8a, 8b formed by rubber-coating reinforcing elements 10a, 10b extending slantly with respect to the tire's circumferential direction.