Abstract: A pneumatic tire according to the present embodiment includes a shoulder main groove that is disposed on one side in a width direction from a tire equatorial plane and extends in a tire circumferential direction, a shoulder land portion that is formed between a ground contact end and the shoulder main groove, and a plurality of slits that divide the shoulder land portion into a plurality of blocks in the tire circumferential direction. The shoulder main groove is formed of a zigzag groove in which an inward bent portion and an outward bent portion are alternately and repeatedly disposed, and angles of the slits with respect to the tire width direction are provided to be 10 degrees or less.

Abstract: The pneumatic tire according to the present embodiment includes a central land portion that is formed on the other side of the shoulder main groove in the tire width direction, and a plurality of inclined grooves that are provided in the central land portion at intervals in the tire circumferential direction. The inclined groove is a groove in which one end is open to the shoulder main groove and the other end terminates in the central land portion, and extends in a direction inclined with respect to the tire circumferential direction, and a length along the tire circumferential direction is 90% or more and 180% or less of a ground contact length on the tire equator when a normal load is applied.

Abstract: A rib-like land section partitioned by main grooves, a plurality of sub-grooves provided in the rib-like land section at intervals in the tire circumferential direction and a groove hole provided between the sub-grooves adjacent to each other and extending in the tire circumferential direction are provided in a tread section. The sub-groove includes a lateral groove portion, in which one end opens to the main groove and the other end terminates inside the rib-like land section, and a longitudinal groove portion extending from the other end of the lateral groove portion to one side in the tire circumferential direction and terminating inside the rib-like land section. The groove hole is formed so that a groove depth at one end part close to a terminal end of the longitudinal groove portion becomes shallower than a groove depth at the other end part far from the terminal end.

Abstract: The pneumatic tire according to the present embodiment includes a shoulder land portion that is formed between a ground contact end and a shoulder main groove, and a plurality of slits that divide the shoulder land portion into a plurality of blocks in a tire circumferential direction, in which the shoulder main groove is formed of a zigzag groove in which an inward bent portion and an outward bent portion are alternately and repeatedly disposed, the slit is connected to the inward bent portion and the outward bent portion, in the shoulder land portion, a chamfered portion is provided on a groove wall facing the shoulder main groove, and in the chamfered portion, a surface width of the chamfered portion is set to increase from the outward bent portion side toward the inward bent portion side.

Abstract: A wheel resonator, which is provided by integrating a first member having a first welding surface with a second member having a second welding surface and includes a volume chamber and a communicating tube. The volume chamber has a flat shape and is configured to extend along an outer surface of a vehicle wheel when the wheel resonator is attached to the vehicle wheel. The first welding surface and the second welding surface are welded to each other, and are provided on a single welding plane. The welding plane extends in a circumferential direction and a width direction of the vehicle wheel when the wheel resonator is attached to the vehicle wheel, is a plane on which the volume chamber is divided into two volume portions, and is a plane on which the communicating tube is divided into two communication portions. The communicating tube extends along the welding plane.

Abstract: A tire mold is provided with a groove-like saw cut in an area of a tire molding surface which comes into contact with a side surface of a tire. The saw cut comprises a pair of circumferential saw cuts arranged to be spaced in a tire diametrical direction, a grid-like saw cut which is expanded between the pair of circumferential saw cuts, and a plurality of frame-like saw cuts which are dotted between the pair of circumferential saw cuts. The frame-like saw cuts fringe a closed area which is wider than a smooth area defined by the grid-like saw cut. The grid-like saw cut surrounds the frame-like saw cuts to prevent the frame-like saw cuts from coming into contact with each other. The frame-like saw cuts are coupled to each other via the grid-like saw cut.

Abstract: A pneumatic tire includes: a tread including a tread surface; and a sidewall extending to an inner diameter side in a tire radial direction and formed continuous with an outer end in a tire width direction of the tread. A circumferential groove extending in a tire circumferential direction is formed in the sidewall. The circumferential groove includes a plurality of circumferential groove portions which are arranged at intervals in the tire circumferential direction without overlapping each other in the tire radial direction. Each of the plurality of circumferential groove portions extends obliquely with respect to the tire circumferential direction, and is located in a tire radial direction range which is not less than 4% and not larger than 40%, of a tire sectional height from an outermost diameter end position of the tread surface to the inner diameter side in a side view of the pneumatic tire.

Abstract: A pneumatic tire includes a tread rubber forming a tread; and a sidewall rubber forming a sidewall and extending from an outside end in a tire width direction of the tread rubber to an inner diameter side in a tire radial direction. A circumferential groove extending in a tire circumferential direction over the tread rubber and the sidewall rubber is formed on an outer surface of the pneumatic tire. The circumferential groove includes a plurality of circumferential groove portions that are arranged at intervals in the tire circumferential direction without overlapping each other in the tire radial direction. Each of the plurality of circumferential groove portions traverses a rubber interface between the tread rubber and the sidewall rubber in the tire radial direction on the outer surface.

Abstract: A tire mold is provided with a groove-like saw cut in an area of a tire molding surface which comes into contact with a side surface of a tire. The saw cut comprises a pair of circumferential saw cuts arranged to be spaced in a tire diametrical direction, a grid-like saw cut which is expanded between the pair of circumferential saw cuts, and a plurality of frame-like saw cuts which are dotted between the pair of circumferential saw cuts. The frame-like saw cuts fringe a closed area which is wider than a smooth area defined by the grid-like saw cut. The grid-like saw cut surrounds the frame-like saw cuts to prevent the frame-like saw cuts from coming into contact with each other. The frame-like saw cuts are coupled to each other via the grid-like saw cut.

Abstract: A tire mold is provided with a groove-like saw cut in an area of a tire molding surface which comes into contact with a side surface of a tire. The saw cut comprises a pair of circumferential saw cuts arranged to be spaced in a tire diametrical direction, a grid-like saw cut which is expanded between the pair of circumferential saw cuts, and a plurality of frame-like saw cuts which are dotted between the pair of circumferential saw cuts. The frame-like saw cuts fringe a closed area which is wider than a smooth area defined by the grid-like saw cut. The grid-like saw cut surrounds the frame-like saw cuts to prevent the frame-like saw cuts from coming into contact with each other. The frame-like saw cuts are coupled to each other via the grid-like saw cut.

Abstract: A pneumatic tire has a tread that is provided with a plurality of blocks comparted in a tire circumferential direction by a lateral groove. A sipe formed in each of the blocks has a narrow portion that is open in a tread surface, and a wide portion that is communicated with an inner side in a tire diametrical direction of the narrow portion and is widened than the narrow portion. The wide portion gradually increases a widening length in one side in a width direction and gradually decreases a widening length in other side in the width direction, from one end portion of the sipe toward other end portion, and accompanies an angle change at a time of appearing on the tread surface due to a progress of a wear.

Abstract: A set of pneumatic tires that are mounted on a vehicle such as a compact or subcompact car, and to an arrangement of mounting the pneumatic tires on the vehicle, which enable omitting of tire rotation without adversely affecting productivity and performances of the tires. Dimensions, shaping and contour as well as tread pattern of the tires for the drive wheel are identical or substantially identical with those for the non-drive wheels. And, wear resistance of the tires for the non-drive wheels is lower than that for the drive wheels due to discrepancy in rubber compositions for forming tire treads between the tires for drive and non-drive wheels. The wear resistance may be defined as a mileage per 1 mm wear in depth direction of grooves on the tire tread around its center line.

Abstract: A pneumatic tire is provided with a main groove extending along a tire circumferential direction in a tread. A side wall of a land portion facing the main groove extends so as to be inclined with respect to a tire circumferential direction between a pair of corner portions. The corner portion positioned in an inner side in a width direction of the main groove is set to an inner corner portion and the corner portion positioned in an outer side is set to an outer corner portion. In the inner corner portion, the side wall is formed by a stepped surface expanding to the outer side in the width direction toward a groove bottom and an expansion to the outer side in the width direction in the stepped surface is made smaller from the inner corner portion toward the outer corner portion.

Abstract: In the invention, a tread surface is provided with a groove portion including a main groove continuously extending in a tire circumferential direction, and a land portion including a rib or a block separated by the main groove, wherein the land portion includes a first edge portion having a depression row formed by arranging long hole shaped depressions extending along the groove portion in the tire circumferential direction and a second edge portion extending along the main groove while being different in position in a tire width direction from the first edge portion, and not having the depression row.

Abstract: In a tread part, a land part (block) partitioned by a main transverse groove is provided with a thin groove having a narrower groove width than the main transverse groove and extending in a tire width direction. On a groove lateral face which is one of opposing groove lateral faces of the thin groove, ridges projecting toward the other groove lateral face and extending in a depth direction of the thin groove are provided. A plural number of the ridges are provided in parallel to each other at intervals in a length direction of the thin groove, and an extending length in the depth direction is set up to include at least two kinds.

Abstract: A pneumatic tire has a sipe is formed in a land portion of a tread surface. The sipe has a wide region in which a sipe width is made larger than a tread at position which is at a distance from the tread. The wide region is constructed by alternately providing a concave groove extending in a depth direction of the sipe in both sides of a sipe wall surface along a longitudinal direction of the sipe.