Abstract: A sole which is attached to a ground contact region of an athletic prosthetic leg having a leaf-spring-like leg portion extending to a side of a toe via at least one curved portion, the ground contact region extending in an arc from the toe to a side of the curved portion is provided. The sole includes a bottom surface having a shape conforming to an extending shape of the ground contact region, and the bottom surface has at least one width direction land portion defined by a plurality of width direction grooves extending in a width direction of the sole. Moreover, the width direction land portion includes a chamfer at each of both end edges at border positions, respectively, between a contact patch and both side walls facing the plurality of width direction grooves.

Abstract: A sole for a prosthetic leg, attached to a ground contact region of the prosthetic leg, includes a bottom surface including: a first inclined surface portion including a first inclined surface inclined such that an amount of recess in a sole thickness direction gradually increases from one to the other sides in a predetermined direction in a planar view; and a second inclined surface portion including a second inclined surface inclined such that the amount of recess in the sole thickness direction gradually increases from the other to the one sides in the predetermined direction in the planar view. The first and second inclined surface portions are mutually connected in a connecting direction crossing the predetermined direction in the planar view, so that a continuous groove in which the first and second inclined surfaces constitute a part of a side wall and which extends in the connecting direction is defined.

Abstract: A pneumatic tire comprising on a tread surface 1 a plurality of blocks 7, wherein: the blocks have an inclined groove 43 formed thereon; the inclined groove has a connecting portion 43a connected to the circumferential main grooves, a wide-width portion 43b connected to the connecting portion, and a narrow-width portion 43c connected to the wide-width portion; the wide-width portion and the narrow-width portion have inclination angles with respect to the tire circumferential direction smaller than the connecting portion; the blocks have a sipe 52a formed thereon, the sipe having one end opening to the connecting portion and the other end opening to the circumferential main grooves; and the sipe has a bent portion.

Abstract: A tire includes a tire frame member formed of a resin material, the tire frame member including: a bead portion, a side portion that extends toward a tire radial direction outer side from the bead portion, and a crown portion that extends toward a tire width direction inner side from the side portion; and a tread formed of a rubber material, the tread being disposed at the tire radial direction outer side of the tire frame member, a plurality of circumferential direction grooves that extend in a tire circumferential direction being formed in a tread surface, and a groove width of a circumferential direction groove having a widest groove width along the tire width direction being within a range of from 5% to 15% of a ground contact width of the tread surface.

Abstract: A pneumatic tire is provided that has enhanced traction performance. A shoulder main body portion of a first shoulder block is formed with a step portion projecting out in a tire circumferential direction. A height of the step portion is set lower than a height of a tread face of the shoulder main body portion and higher than the height of a lug groove. The step portion extends from a tire equatorial plane side end portion of the shoulder main body portion, beyond a tire width direction ground contact edge, to a tire shoulder portion.

Abstract: A tire includes a tire frame member that is formed from a resin material and has a bead portion, side portions, and a crown portion, a belt layer serving as an example of a reinforcing layer that is disposed at the outer side in a tire radial direction of the tire frame member, and has a higher bending rigidity than outer circumferential portions of the tire frame member, a top tread serving as an example of a tread that is formed from a rubber material and is disposed at the outer side in the tire radial direction of the belt layer, and first width direction grooves serving as an example of width direction grooves that are provided at the top tread. An aperture surface area of one of the first width direction grooves within a total ground contact surface of the tread of one circumferential direction portion of the tire is 0.02% or less relative to a surface area of a total ground contact surface of the tread of one circumferential portion of the tire.

Abstract: A pneumatic tire comprising on a tread surface 1 a plurality of blocks 7, wherein: the blocks have an inclined groove 43 formed thereon; the inclined groove has a connecting portion 43a connected to the circumferential main grooves, a wide-width portion 43b connected to the connecting portion, and a narrow-width portion 43c connected to the wide-width portion; the wide-width portion and the narrow-width portion have inclination angles with respect to the tire circumferential direction smaller than the connecting portion; the blocks have a sipe 52a formed thereon, the sipe having one end opening to the connecting portion and the other end opening to the circumferential main grooves; and the sipe has a bent portion.

Abstract: A pneumatic tire, while achieving excellent drainage performance by projections and depressions formed in a circumferential groove, can reduce road noise by making the circumferential stiffness of a land portion uniform even in the presence of such projections and depressions. A plurality of protuberances are arranged in at least one circumferential groove at intervals in the tread circumferential direction, the protuberances being raised from the inner surface of the circumferential groove and extending from the groove bottom of the circumferential groove to at least one groove wall surface in the tread width direction. A plurality of sipes are arranged in a land portion adjacent to the groove wall surface of the circumferential groove to which the protuberances extend, the sipes being open to the circumferential groove in areas where the respective protuberances are arranged.

Abstract: A tire includes a circumferential direction main groove on a tread surface, first and second circumferential supplemental grooves located on both sides of the circumferential direction main groove, and first and second central land portions formed between the circumferential direction main groove and the first and second circumferential direction supplemental grooves. The first and second central land portions have plural width direction sipes, respectively, and each of the width direction sipes extends to the circumferential main groove, the circumferential main groove has shallow grooved portions and deep grooved portions. The deep grooved portions are deeper than the shallow grooved portions, and the shallow grooved portions are shallower than the circumferential supplemental grooves.

Abstract: This tire has a buttress section to which a plurality of depressions (100) have been formed along the tire peripheral direction (DC). The depressions (100) have: a first outer edge (110) that bulges inward in the tread width direction (DT); and a second outer edge (120) that is continuous with the first outer edge (110) and that bulges outward in the tread width direction (DT) with respect to the first outer edge (110). The distance between the deepest section (150) of the depressions (100) and the ground-contact end of the tread varies along the tire peripheral direction (DC).

Abstract: A tire wherein a first bulge part and a second bulge part are formed in a circumferential direction groove. The first bulge part has a narrow-tip shape such that, in the tire tread plan view, the size in the tread width direction diminishes along a first direction in the tire circumferential direction. The second bulge part has a narrow-tip shape such that, in the tire tread plan view, the size in the tread width direction diminishes along a second direction opposite to the first direction in the tire circumferential direction. A plurality of first bulge parts and second bulge parts are provided at predetermined intervals in the tire circumferential direction. A groove part which extends in the tire circumferential direction is provided between the first bulge part and the second bulge part which opposes the first bulge part in the tread width direction.

Abstract: A pneumatic tire which comprises a land portion (10) and a land portion (20). A main groove (50) extending along the tire circumferential direction is formed between the land portion (10) and the land portion (20). The land portion (10) comprises a groove wall (10a) that forms the main groove (50). The land portion (20) comprises a groove wall (20a) that forms the main groove (50). The groove wall (10a) and the groove wall (20a) are serpentine along the tire circumferential direction (R) when seen from a plane of the tread surface, and the groove width of the main groove (50) in the tread width direction (WTR) varies in a predetermined repetition interval (?) along the tire circumferential direction. The ratio of the minimum width (WMIN) of the groove to the maximum width (WMAX) of the groove satisfies a relation of 35%?WMIN/WMAX?85%.

Abstract: The pneumatic tire 1 satisfies both SW?175 mm and OD/SW?3.6, where SW is the width of the pneumatic tire 1 and OD is the outer diameter of the pneumatic tire 1. Moreover, the pneumatic tire 1 satisfies both SW?175 mm and OD/RD?1.4, where SW is the width, OD is the outer diameter, and RD is the inner diameter of the pneumatic tire 1, which is the diameter of a portion of the pneumatic tire 1 (an end portion of a bead portion) in contact with a wheel in a state where the pneumatic tire 1 is fitted to the wheel.

Abstract: Both wet weather performance and steering stability performance are achieved. Lateral main grooves (16) formed in a tread (12) extend in a direction intersecting with circumferential main grooves (14) and open onto the circumferential main grooves (14). Water between the tread (12) and a road surface during wet weather running is accordingly discharged through the lateral main grooves (16) to the circumferential main grooves (14). The end portions of the lateral main grooves (16) opening onto the circumferential main groove (14) are provided with intersection portions 18 where first land portions (21) and second land portions (22) adjacent to each other in the tire circumferential direction at a lateral main groove (16) support each other in the tire width direction. The end portions at the circumferential main groove (14) side of the first land portions (21) and the second land portions (22) do not therefore readily tilt over even when a large slip angle is imparted to the tire.

Abstract: A tire provided with a plurality of land portions formed by a main groove extending along a tire circumferential direction, wherein the main groove is formed with one intra-groove recessed in a tire inner direction from a surface of the main groove, the intra-groove comprises: a first circumferential groove portion extending along the tire circumferential direction on the first groove wall; a first inclined portion extending from the first groove wall toward the second groove wall on a groove bottom of the main groove; a second circumferential groove portion extending along the tire circumferential direction on the second groove wall; and a second inclined portion extending from the second groove wall toward the first groove wall on the groove bottom of the main groove.