Abstract: Tread band for a tire having a tread surface and comprising a plurality of recesses of total depth H* opening onto the tread surface, each recess comprising at least two cavities of a first type of cavities, each of these cavities of a first type being delimited by a main wall and having a depth Hi, the main wall of each cavity of the first type is such that its intersection with a virtual surface parallel to the running surface in the new condition and passing through the points of the said wall that are furthest towards the outside of the tread forms an exterior contour that is closed and of length Ce, the main wall of each cavity of the first type is such that its intersection with a virtual surface parallel to the running surface in the new condition and passing through the points of the main wall furthest towards the inside of the tread forms an interior contour which is closed and of length of length Ci, this tread band being characterized in that the cavities of a first type are arranged at different l

Abstract: The present invention concerns tire treads having projecting features comprising wear indicators, stone ejectors, and/or noise suppressors arranged within voids submerged below the top, outer side of a tread. Particular embodiments of the invention provide a tire tread having a submerged void extending into to the tread thickness from the bottom side of the tread to a terminal location spaced below the tread top side, the top side forming a ground-engaging side of the tread. Such embodiments further include a plurality of projecting features arranged within the submerged void below the terminal location of the submerged void, the plurality of projecting features being further arranged in a spaced arrangement along a length of the submerged void, each of the plurality of projecting features extending partially across a width of the submerged void, which may comprise a groove, for example. The invention includes methods of forming the tread and a treaded tire.

Abstract: Tire for a heavy goods vehicle, comprising a crown reinforcement, and, radially outside this crown reinforcement, a tread having a total thickness PMU of material intended to become worn during running, the crown reinforcement being formed by at least two working plies and a protection ply positioned radially outside the working plies and radially inside the tread, the narrowest working ply having a width in the range from 70% to 90% of the width W of the tread, the protection ply having a width at most equal to 70% of the width of the narrowest working ply, the tread comprising grooves only in the part radially outside the protection ply, each circumferentially orientated groove having a depth at least equal to 75% of the maximum thickness intended to become worn PMU.

Abstract: A pneumatic tire has a tread pattern including a lateral groove extending in a direction intersecting a tire circumferential direction and a shoulder block comparted by the lateral groove. A depression region in which a plurality of depressions extending in the tire circumferential direction are arranged in a tire width direction are formed on a surface of the shoulder block in an outer side in the tire width direction than a ground-contact end. The depressions are open to the lateral groove, and are segmented in a center portion in the tire circumferential direction of the shoulder block.

Abstract: A motorcycle tire 1 comprising tread portion 2 having inclined main grooves 11 including main part 13 extending to cross tire equator C from a tire equator side toward a tread edge side while inclining to a former grounding side in a tire rotation direction wherein an inclination angle of main part 13 at the tire equator is from 0 to 15°, and a plurality of inclined sub-grooves 12 extending between the main grooves 11, 11 from axially outward of the tire equator while inclining in the same direction as the main part 13, and the tread portion 2 satisfying a relationship of: Lc<Lm<Ls, or Lc>Lm>Ls wherein Lc is a land ratio of crown region Cr, Ls is a land ratio of a pair of shoulder regions Sh, and Lm is a land ratio of a pair of middle regions Md.

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: Disclosed is a pneumatic tire for motorcycle wherein edge effect can be achieved without changing the design of block pattern, and stability of steering such as grip, feeling of grounding, or controllability of slip is enhanced. When a block having a recess in which a protrusion is formed on the bottom is provided in a tread, edge component increases correspondingly as compared with a block provided only with a recess (having no protrusion), and thereby traction can be enhanced. Since it is not required to increase the hardness of rubber of the read nor to enlarge the block size, feeling of grounding is ensured and controllability of slip can be ensured in a muddy place or on a soft road surface.

Abstract: Particular embodiments of the present invention include tire treads that include a tread body having a length, a width, and thickness, the thickness being bounded by an outer surface and an underside surface. Such treads may also include a void positioned within the thickness of the tread body. Such treads may further include one or more members extending between the void and the tread underside surface. Other embodiments of the present invention include a tire having such treads, as well as molds for forming such treads.

Abstract: Provided is a run-flat tire having a substantially-crescent-shaped cross section, which makes it possible to achieve both durability at the time of run-flat travel and ride comfort at the time of travel at a normal inner pressure. A rigidity reducing portion that reduces a tire rigidity in the width direction extends in the circumferential direction on a surface of a tread rubber in an area located on the inner side than an end of a belt in the tire width direction and on the outer side than a road-contacting end in the tire width direction under a 75% load state.

Abstract: Tire for a heavy goods vehicle comprising a tread of total thickness E and total volume V, having a tread surface intended to come into contact with a roadway, at least one cavity or groove that is continuous in a main direction, and delimited by side walls connected by a bottom, a cross section, the points furthest towards the inside of the bottom of each cavity defining a bottom line, wherein each cavity or groove comprises a plurality of open sections open onto the tread surface in the new state and a plurality of closed sections, connected to the open sections being arranged in alternation, each closed section being spaced away from the tread surface by a bridge of rubber, wherein the points on the bottom line of said cavity or groove lie at distances between a minimum distance Dm and a maximum distance DM with respect to the tread surface, the bottom lineof each cavity or groove following a wavy geometry of positive amplitude equal to the difference (DM?Dm).

Abstract: A pneumatic tire including a closed sipe in a land portion formed in a tread surface, provided with at least three cuts extending in a radiation direction from an imaginary axis that extends in a depth direction of the land portion, and that terminate in the land portion. A widened portion where a width of a cut is locally increased is formed at at least one position of an intermediate region from the imaginary axis to a terminating portion of the cuts.

Abstract: A pneumatic tire comprises a tread portion provided with an asymmetrical tread pattern comprising a pair of crown circumferential grooves defining a crown rib therebetween. The crown rib is provided with: a central narrow circumferential groove subdividing the crown rib into a crown-rib outside portion and a crown-rib inside portion; cooling slots extending from the crown circumferential grooves; and cooling holes.

Abstract: Tire tread comprising a plurality of elements forming relief, each element comprising a contact face, a plurality of elements of the tread being provided with at least one incision, this incision opening onto the contact face in order to form second edges parallel with one another and with an average orientation at most equal to 45° with the direction of the axis of rotation of the tire provided with this tread, each incision also opening onto two lateral surfaces of the element so as to form strips having a length L and a width d, this width d being less than the length L, each strip comprising at least one cavity entirely contained in the strip and of which the largest dimension is oriented so as to be in the direction of the length of the strip inside which it is formed, each cavity having a length Lc, measured along its largest dimension, which is between 10% and 90% of the length L of the strip, the total of the lengths Lc of all the cavities of one and the same strip being more than 10% of the length L

Abstract: A motorcycle tire for running on rough terrain comprises a tread portion having a developed tread width and provided with a plurality of tread blocks. The tread blocks include a plurality of crown blocks defined as having a ground contacting top surface whose centroid is located within a crown region defined as having a developed width of ? of the developed tread width and centered on the tire equator. The crown blocks include a plurality of central crown blocks whose axial distance from the tire equatorial plane to the centroid is not more than 2% of the developed tread width, and a plurality of off-center crown blocks whose axial distance from the tire equatorial plane to the centroid is more than 2% and not more than 6% of the developed tread width.

Abstract: A pneumatic tire includes a tread having at least one main groove and a plurality of ribs extending in the tire-circumferential direction. At least one of the ribs has a plurality of narrow grooves formed at intervals in the tire-circumferential direction. At least one intermittent sipe is formed corresponding to at least one of the narrow grooves. The narrow grooves are grooves each having a portion extending substantially along the tire-circumferential direction and having a groove width smaller than the at least one main groove. The at least one intermittent sipe has a plurality of holes that are intermittently formed, and at least one solid part located between adjacent two of the holes. The holes and the solid part are arranged in a direction intersecting the narrow grooves. The intermittent sipe intersects the corresponding narrow groove in the at least one solid part.

Abstract: Tire comprising a tread having a tread surface (11) and comprising a plurality of grooves (2) of generally circumferential orientation and of depth H, these grooves (2) defining a plurality of rubber elements (3, 30), at least one of which comprises a plurality of cavities (6), each cavity (6) of volume Vc of generally elongate shape with a total length Lc and being designed to communicate with a single groove (2) of generally circumferential orientation, each cavity (6) being extended all the way along its length Lc by an incision (80) which extends radially outwardly to emerge at the tread surface (11), this tire being such that the incision (80) comprises an incision portion (81) beginning at the cavity and forming an angle A of at least 10° with a line perpendicular to the tread surface and passing through the point of intersection of the incision with the cavity (6).

Abstract: Provided is a pneumatic tire where a plurality of main grooves extending along the tire circumferential direction, lateral grooves extending in the direction inclined with respect to the tire width direction, and land portions partitioned by the main grooves and the lateral grooves are formed in a tread portion. The land portion includes an obtuse angle portion defined at an obtuse angle by the main groove and the lateral groove, and an acute angle portion defined at an acute angle by the main groove and the lateral groove. A plurality of holes are formed in a side wall of the land portion facing the main groove at intervals in the tire circumferential direction. The holes formed on an obtuse angle portion side are arranged at positions closer to a ground contact surface of the land portion than the holes formed on an acute angle portion side.

Abstract: A layer of cellular material forms a running layer (14A) of a tread (14) in which tread pattern elements (20, 22, 26) are made. In order to form the cellular material, an uncured blank is provided with a mass of material comprising p,p?-oxybis(benzenesulphonyl hydrazide) that forms a pore-forming agent. The uncured blank is placed in a vulcanization mold (28) comprising molding elements (30, 32, 34). At least 95% of the molding elements (30, 32, 34) each satisfy the following two conditions: a) the molding element (30, 32, 34) is separated from at least one other molding element (30, 32, 34) by a distance, expressed in millimetres, of less than or equal to DM=6.85+0.

Abstract: The tyre comprises a tread (14) that has a running layer (14A) made of cellular material having a thickness E and a degree of expansion of greater than or equal to 50%. The running layer (14A) comprises hollow tread pattern elements (20, 22, 26). At least 95% of the hollow tread pattern elements (20, 22, 26) each satisfy the following two conditions a) and b): a) the tread pattern element (20, 22, 26) is separated from at least one other hollow tread pattern element (20, 22, 26) by a distance less than or equal to DP=7 mm, the separation distance between two hollow tread pattern elements (20, 22, 26) being the shortest distance between these two tread pattern elements (20, 22, 26) travelled in the cellular material, b) the tread pattern element (20, 22, 26) has a depth at least equal to 80% of the thickness E of the running layer (14A).

Abstract: To significantly improve performances on ice by optimizing a tread pattern. This pneumatic tire has, in at least a part of a tread portion 1, a block group GB formed by arranging blocks 3 close to each other, the blocks being defined by grooves 2 and being independent of each other, and when a symbol P (mm) stands for a reference pitch length of the blocks in the block group GB, a symbol W (mm) stands for a width of the block group GB, a symbol a (pieces) stands for the number of the blocks 3 existing in a reference zone Z of the block group GB, the reference zone being comparted by the reference pitch length P and the width W, and a symbol N (%) stands for a negative ratio in the reference zone Z, a block number density S, which is the number of the blocks per unit of an actual ground contact area of the block group GB and given by a formula of S=a/{P×W×(1?N/100)}, is set within a range of not less than 0.003 (pieces/mm2) but not more than 0.04 (pieces/mm2).

Abstract: A pneumatic tire comprises, on a tread surface, a circumferential groove which extends in a tire circumferential direction, a land portion which is zoned by the circumferential groove, and a plurality of lag grooves in which one end is open to a side of the circumferential groove and another end is terminated within the land portion, wherein the land portion has a rib-like portion which is successive in a tire circumferential direction and a wing portion which is zoned by the lag grooves, and wherein a plurality of small holes are formed on a surface of the land portion along a line connecting trailing end portions of the lag grooves adjacent to each other.

Abstract: A tire tread 2 for a vehicle tire has a plurality of tread elements 10 extending radially outwardly from a tread base 24 to a radially outer surface. Each tread element 10 is defined by adjacent grooves 12, 14. The tread 2 has at least one tread element 10 projecting from the tread base 24 and having one or more tread wear indicators TWI 20. Each TWI 20 is located at the intersection of two grooves 12, 14 adjacent or integral to the at least one tread element 10.

Abstract: A pneumatic tire (10) provided with: a rib-like land portion (110), a rib-like land portion (210), and a rib-like land portion (240) which are divided by circumferential grooves (11, 12, 21, 22) extending in the circumferential direction of the tire; and resonators which are recessed inward in the radial direction of the tire, which each form a predetermined space when the rib-like land portion (110) makes contact with the road surface, and which communicate with circumferential grooves. The resonators include first resonators which are provided in the circumferential direction of the tire, and also include second resonators which are, when the tire is mounted on a vehicle, located further toward the inboard side than the first resonators and are arranged in the circumferential direction of the tire. The number of the second resonators is greater than the number of the first resonators.

Abstract: A pneumatic tire (10) provided in a rib-like land section (110) thereof with: an air chamber (130A) in which recessed portions (131) are repeated in the circumferential direction of the tire at predetermined pitches; and constriction groove (121) which communicate with the recessed portions (131). A height (H) changes in the circumferential direction of the tire. A bottom surface (132) has substantially the same height as the ground contact surface at a position which is the highest point of the bottom surface (132) which is maximally raised toward the ground contact surface. The volume of the space formed between each constriction groove section (121) and the road surface is less than the volume of the space formed between each recessed portion (131) and the road surface. One end (121a) of each constriction groove section (121) communicates with the corresponding recessed portion (131), and the other end (121b) of the constriction groove section (121) communicates with a circumferential groove (11).

Abstract: A tire having a rotation timing indication hole of the invention has a rotation timing indication hole comprising a multi-step hole provided in a tire tread, and respective steps of the hole have different contours from each other. Since the contour of the hole changes when the tire is worn, the rotation timing of the tire can be recognized.

Abstract: A tire is provided having a plurality of shoulder blocks separated by axial grooves and located along at least one side of the tire. Apertures extend through the shoulder blocks to connect with a circumferential groove. The apertures are located within a certain radial position relative to the axial grooves. Each aperture has a bottom positioned at a radial depth HB relative to the shoulder block and extends completely through the shoulder block along the axial direction. Each aperture has a radial overlap HL with the axial grooves. The ratio HL/Ho is about 0.15 or less and the ratio of HB/H is in the range of about 1.0 to about 1.1.

Abstract: Provided is a pneumatic tire having snow performances which are capable of being enhanced without sacrificing its running performance on dry road surfaces. A pneumatic tire of the invention includes two first main grooves, a plurality lateral grooves and a plurality of sipes in a tread part. In the pneumatic tire, a groove wall surface, of each first main groove, closer to a tire equatorial line is formed so as to cyclically repeat, in the tire circumferential direction, a change in an inclination angle of the groove wall surface to a direction normal to a tread, the change being a gradual increase from a minimum value of 0° to 15° to a maximum value of 15° to 45°. In places where the inclination angel of the groove wall surface, of the first main groove, closer to the tire equatorial line, is at its maximum, no lateral grooves communicate with the first main groove, and in the places, the other groove wall surface, of the first main groove, closer to a corresponding contact end extends uninterruptedly.

Abstract: A pneumatic tire with improved steering stability without raising air columnar resonance noise is provided. The pneumatic tire comprises first oblong holes 11 having an opening portion of a trapezoidal shape that is elongated in the depth direction of a main groove 1 and whose depth D1 on the tread surface side is shallower than a depth D2 on the groove bottom side and second oblong holes 12 having an opening portion of a trapezoidal shape that is elongated in the depth direction of the main groove and whose depth D4 on the groove bottom side is shallower than a depth D3 on the tread surface side, wherein number of the first oblong holes 11 is 50 to 100% of the sum of oblong holes 11 and 12, the depths D2 and D3 are at least not less than 0.5 mm and 0.05 to 0.3 times a width W of the main groove 1, the depths D1, D4 are not greater than 0.1 times a depth D of the main groove 1, widths w of the oblong holes 11, 12 are at least not less than 0.5 mm and 0.05 to 0.

Abstract: To provide a winter-use pneumatic tire with which the performance on ice can be enhanced and tread pattern durability can be enhanced. The tread for a winter-use pneumatic tire according to the present invention has blocks which are aligned in the circumferential direction and in which are formed respectively at least one thin incision which extends substantially parallel to a circumferential direction edge and which has a widened portion at its bottom, and at least one series of small holes comprising at least two small holes which open in a ground contacting surface of the block and extend in the inward radial direction of the tire, and the at least one series of small holes is formed in a neighboring region of the circumferential direction edge, and is formed in an intermediate portion between the circumferential direction edge and the at least one thin incision.

Abstract: Tread for a tire provided with a running surface intended to come into contact with the roadway when running, this tread comprising a plurality of blocks of mean axis XX? intersecting the running surface of the tread, each block, including a side wall that makes a full circuit of the block about the axis XX?. This side wall intersects the running surface at an edge with a closed geometric outline, this edge delimiting a contact surface via which the block makes contact with the roadway. The side wall of the block and the opposite wall delimit an incision, the blocks being provided on their lateral surface with at least one notch having a depth measured perpendicular to the lateral surface of the block and a width measured parallel to the lateral face of the block, the at least one notch at least partially making a circuit of the block about the axis XX?, that is to say at least over 180 degrees.

Abstract: A tire tread provided with a plurality of grooves delimiting blocks and/or ribs and having an average depth H. This tread has a tread surface designed to come into contact with the roadway only along a plurality of raised contact lines. The raised contact lines intersect one another to delimit, on the tread surface, a plurality of contiguous first cavities each formed by a wall which is recessed radially inwardly from the tread surface. The walls of the first cavities are intersected by respective second cavities situated radially.

Abstract: The present invention provides a pneumatic tire with reduced air columnar resonance noise level in comparison with the conventional pneumatic tires. The pneumatic tire comprises large-volume oblong holes 11 formed in a sidewall 10a on one side of a main groove 1 and small-volume oblong holes 12 formed in a sidewall 10b on the other side thereof, respectively, in which a width w1 and a depth d1 of the large-volume oblong hole 11 are at least not less than 0.4 mm and more than 0.05 times but less than 0.25 times a width W of the main groove 1, and a space p1 between the large-volume oblong holes 11 is at least not less than 0.8 mm and more than 0.2 times but less than 1.0 times the width W, a width w2 and a depth d2 of the small-volume oblong hole 12 are at least not less than 0.2 mm and more than 0.01 times but less than 0.05 times the width W, and a space p2 between the small-volume oblong holes 12 is at least not less than 0.4 mm and more than 0.04 times but less than 0.

Abstract: A heavy duty pneumatic tire includes main grooves that extend in the tire circumferential direction. A siped block is provided with at least one sipe to circumferentially subdivide the block into at least two block pieces that include at least one holed block piece provided with at least one small hole. Each small hole extends radially inwardly from the ground contacting surface of the holed block piece to its bottom at a depth in a range of from 30 to 100% of a depth of the main grooves. Each small hole has a round cross-sectional shape to have a maximum radius in a range of from 0.6 to 2.0 mm at the opening of the small hole in the ground contacting top surface. The total opening area of the at least one small hole is 2 to 12% of the overall area of the ground contacting top surface.

Abstract: A heavy duty tire comprises a tread portion provided with a center rib, shoulder ribs and middle ribs therebetween. The middle ribs are provided with closed-end sipes. The sipe comprises: an axially inner segment and axially outer segment inclined at an angle of from 30 to 60 degrees with respect to the tire circumferential direction; and a middle segment therebetween inclined in a direction crosswise to the axially inner and outer segments. The angle ?1 between the axially inner segment and middle segment is from 90 to 110 degrees. The angle ?2 between the axially outer segment and middle segment is from 90 to 110 degrees. The axial length SW of the closed-end sipe measured from the axially inner end to the axially outer end thereof is from 0.50 to 0.90 times the axial width LW of the middle rib.

Abstract: A tread wear indicator may be molded into the shoulder region of a tire tread and may have three symbols. Two of the symbols may be alphanumeric characters and the third symbol may surround the two symbols. All three symbols may be visible prior to wearing the tread. After the tread has been worn a first amount, the first symbol may be invisible and the second and third symbols may be visible to indicate to the user that a new tire will soon be required. After the tread has been worn a second amount, the first and second symbols may be invisible and the third symbol may be visible to indicate to the user that a new tire is required immediately.

Abstract: A structure for a tread pattern of a pneumatic tire includes a radially extending pedestal, a first set of cylindrical voids extending radially through the pedestal, a second set of cylindrical voids extending radially through the pedestal, and a radially extending void ring circumscribing the pedestal.

Abstract: The tread band of a tire has two circumferential portions, a central one and an inner intermediate one, respectively, that are subdivided into center and intermediate blocks respectively; an inner-shoulder circumferential portion has first and second inner-shoulder cuts, axially offset from each other and distributed in an alternated sequence, to confine a continuous inner-shoulder rest surface with an undulated course; and an outer intermediate circumferential portion has first and second intermediate cuts, and an outer-shoulder circumferential portion has first and second outer-shoulder cuts. The first and second intermediate cuts and the outer-shoulder cuts, respectively, mutually converge at an angle of about 20° and are axially offset from each other and circumferentially distributed in an alternated sequence, to delimit continuous rest surfaces, an intermediate and outer-shoulder surface respectively, with an undulated course.

Abstract: A pneumatic tire has a rib sectionalized by main grooves extending along a tire circumferential direction in a center portion of a tread surface. Depressions are arranged in series in a center portion in a width direction of the rib so as to leave a space in the tire circumferential direction. The depressions extend in the tire circumferential direction and become wider from both end portions in a longitudinal direction toward a center portion.

Abstract: A pneumatic tire comprises main grooves 1 extending in the tire circumferential direction formed in a tread, wherein there are provided with a plurality of oblong holes 11 extending in the depth direction of the main groove 1 and communication grooves 12 extending diagonally with respect to the tread surface to communicate the oblong holes 11, a width w1 and a depth d1 of the oblong hole 11 are at least not less than 0.2 mm and 0.01 to 0.25 times a width W of the main groove 1, a height h of the oblong hole 11 is 50 to 80% of a depth D of the main groove 1, a space p1 between the oblong holes 11 is at least not less than 0.4 mm and 0.04 to 1.0 times the width W of the main groove 1, a width w2 and a depth d2 of the communication groove 12 are at least not less than 0.2 mm and 0.01 to 0.25 times the width W of the main groove 1, and two or more communication grooves 12 are present within the contact ground length L of the main groove 1.

Abstract: Provided is a pneumatic tire capable of providing improved lateral sliding resistance on snow, improved traction on snow, and improved uneven-wear resistance. The provided tire includes: at least one circumferential main groove formed in a tread portion and extending in the tire-circumferential direction; and plural columns of land areas defined in the tread portion by the circumferential main groove. Plural lug grooves and plural sipes are formed in at least one of the plural land-area columns. Each of the lug grooves extends in the tire-width direction. At least one end of each lug groove is formed as a dead end located in the corresponding land area. Each of the sipes extends so as to surround the corresponding lug groove. Each sipe intersects with the lug groove in question, and is communicatively connected to the corresponding single one of the circumferential main grooves at the two ends of the sipe.

Abstract: An off-road tire tread for a tire includes a series of cavities extending into the tread surface, each cavity defined by sidewalls extending from a tread surface to an inclined bottom cavity surface, the inclined bottom cavity surface extending from a relatively deep leading cavity end to a relatively shallow trailing cavity end. The cavities are directionally oriented to operationally initiate contact with a ground surface at the leading cavity end and form a repeating circumferential pattern along a circumferential extent of the tread surface. The tire tread further may include one or more lug protrusions between each of the cavities extending outward from the tread surface.

Abstract: A mold (150) for a tread layer (40) having tread-forming side and sole-forming side, the sole-forming side having a plurality of mold elements (56) extending therefrom toward the tread-forming side. Either the mold elements (56) or the sole-forming side of the mold is configured to create a tread layer (40) having a recessed tread element such as an incision, lateral groove, longitudinal groove or other void on the sole side of the tread layer that enables the edges of the recessed tread element to obtain full coverage when subjected to an abrasion process.

Abstract: The invention is directed to a pneumatic radial ply truck tire having a tread with a tread depth D, at least two circumferential grooves dividing the tread into at least a first shoulder circumferential rib, an intermediary circumferential rib, and a second shoulder circumferential rib, the tire being characterized by the tread having a base region disposed at depth D and a cap region over the base region, the base region and the cap region adjoining along a boundary, the cap region comprising a cap rubber composition having properties measured at 23° C. of: elongation of 400 to 500%, true tensile of 77 to 83 MPa, 300% modulus of 9 to 11 MPa, tensile strength of 14 to 15 MPa, shore A hardness of 63 to 68, rebound of 20 to 25%; and the base region comprising a base rubber composition having properties measured at 23° C. of: elongation of 470 to 520%, true tensile of 135 to 150 MPa, 300% modulus of 13 to 15.5 MPa, tensile strength of 22 to 25 MPa, shore A hardness of 63 to 67, rebound 50 to 55%.

Abstract: A pneumatic tire comprises, on a tread surface, a circumferential groove which extends in a tire circumferential direction, a land portion which is zoned by the circumferential groove, and a plurality of lag grooves in which one end is open to a side of the circumferential groove and another end is terminated within the land portion, wherein the land portion has a rib-like portion which is successive in a tire circumferential direction and a wing portion which is zoned by the lag grooves, and wherein a plurality of small holes are formed on a surface of the land portion along a line connecting trailing end portions of the lag grooves adjacent to each other.

Abstract: A pneumatic tire has a plurality of upper surface sipes formed on an upper surface of the block and arranged in parallel so as to be spaced in a sipe width direction, and a wall surface sipe extending along a tire diametrical direction in a wall surface positioned in a longitudinal direction of the upper surface sipe. The wall surface sipe is arranged between a pair of adjacent the upper surface sipes.

Abstract: Tire for motor-vehicles provided with a tread pattern wear indicator, where the tire tread is formed by pattern parts in the form of circumferential ribs and/or in the form of blocks and contains at least one circumferential groove, wherein the indicator is arranged in the surface part of the pattern in the circumferential ribs or blocks, which are in contact with the road surface, and is in the form of sipes running radially into tire tread, while the greatest depth of the indicator sipes is smaller than the depth (H) of the circumferential groove. The tread pattern wear indicator (3) consists of seven radial sipes of three different depths, created and arranged so that they form the Arabic numeral 8 in segment depiction.

Abstract: A pneumatic tire is provided which has sufficient total properties and mass productivity of a tire without reducing drainage capability due to narrowed circumferential grooves, achieves high design flexibility of tread patterns and stiffness of land portion as intended, and also effectively reduces undesired air column resonance noise produced by the circumferential grooves. The pneumatic tire includes a circumferential groove 3 which continuously and circumferentially extends in a straight line and arranged on a tread 1, and resonators 5 which are open to the circumferential groove 3 and terminate in a land portion 4, each of the resonators 5 being configured with an air chamber 6 open toward a land portion surface, and a narrowed neck 7 for communication between the air chamber 6 and the circumferential groove 3, and the narrowed neck 7 has the plane maximum width w0 which is within a range of from 3 to 50% of the plane maximum width w1 of the air chamber 6.

Abstract: A pneumatic tire has an upper surface sipe formed on an upper surface of the block, a first wall surface sipe formed in a first wall surface of the block and extending in a direction intersecting the upper surface sipe, and a second wall surface sipe formed in a second wall surface which is adjacent to the first wall surface, and extending in a direction intersecting the upper surface sipe and the first wall surface sipe.

Abstract: An off-road tire (1) comprises a tread portion (2) provided with blocks (10, 11) forming a sea area (8) therearound. The sea area (8) is provided in the bottom (14) thereof with recesses (13), wherein the recesses (13) are arranged circumferentially of the tire and each extend axially of the tire, and the depth (d) of each of the recesses (13) is gradually increased towards its center (13a), whereby the enveloping power is improved.

Abstract: A heavy-duty tire comprises two rows of middle blocks (11). The ground contacting face (S) of each middle block is defined as being surrounded with an axially inner longitudinal edge (14i), an axially outer longitudinal edge (14o), a first-side transverse edge (14a) and a second-side transverse edge (14b). The two transverse edges (14a and 14b) are substantially straight and substantially parallel with each other and inclined with respect to the tire axial direction. The axially inner longitudinal edge (14i) is nonlinear and has an axially inwardly protruding first-side protruding point (15a) and second-side protruding point (15b), and an axially outwardly denting part (16) therebetween. The axially outer longitudinal edge (14o) is nonlinear and has axially outwardly protruding first-side protruding point (20a) and second-side protruding point (20b), and an axially inwardly denting point (21) therebetween.