Abstract: Agricultural vehicle tire having tread (1) with bearing surface (10) on which main lugs (3) and shorter secondary lugs (3) are formed on each side of the equatorial mid-plane (XX?), each secondary lug (3) interposed between two main lugs (2). The main lugs (2) and secondary lugs (3) make up, in the radial direction, a lens (21, 31) of a first material, each lens (21, 31) surmounted by a second material extending to the contact face of the main lugs and the secondary lugs. The viscous modulus G?1 of the first material is at most 60% of the viscous modulus G?2 of the second material. The complex modulus G?1 of the first material differs from the complex modulus G?2 of the second material, the difference between these complex moduli being at most 30% of the complex modulus G?2 of the second material.

Abstract: Pneumatic tires include a tire body having a pair of tire sidewalls, a tread wall extending between the tire sidewalls and a tread portion on the tread wall. The tread portion may include alternating first and second tread patterns around the circumference of the tread wall. Each of the first and second tread patterns may have a main land protruding from the tread wall on a first side of a tread equator dividing the tread portion into equal first and second halves. A main land sidewall portion may extend from the main land and protruding from a first one of the pair of tire sidewalls. A stepped land may protrude from the tread wall on a second side of the tread equator. A stepped land sidewall portion may extend from the stepped land and protruding from a second one of the pair of tire sidewalls.

Abstract: Tread of a tire for an agricultural vehicle having each lug (3) extending over a radial height H in a radial direction (ZZ?) from a bottom surface (5) to a contact face (6), extending over an axial width L in an axial direction (YY?) from an axially inner end face (7) to an axially outer end face (8), and extending over a mean thickness E in the circumferential direction (XX?) from a trailing face (9) to a leading face (10). The leading face (10) of each lug (3) comprises a discontinuity (11) that extends circumferentially in the direction of the trailing face (9), axially inwards from the axially outer end face (8) and radially inwards from the contact face (6). The discontinuity (11) on the leading face (10) of each lug (3) is continued by a recess (12) formed in the bottom surface (5).

Abstract: A downhole tractor assembly operable in a wellbore that includes a tractor body and a tractor wheel assembly. The tractor wheel assembly includes a tractor wheel with teeth around a circumference of the wheel and grooves between adjacent teeth. The grooves include a profile in a plane parallel with the axis of the wheel. Also, each tooth includes an outer face with face grooves on each side of the outer face that extend less than across the wheel.

Abstract: An airless flexible tire including traction lug pairs each having a forward facing traction lug and a rearward facing traction lug cooperatively forming a divided Z or reverse divided Z shape. Each traction lug includes a lateral section and a central section. The central section extends from an end of the lateral section so as to straddle a centerline of the airless flexible tire and includes a number of discrete sidewalls. The discrete sidewalls are different sizes and angled relative to each other. The central sections of paired traction lugs form a space dividing portions of the Z or reverse Z shape. The central sections of nearest traction lugs of adjacent traction lug pairs form a space dividing the adjacent traction lug pairs.

Abstract: A tire 2 has a nominal cross-sectional width not less than 355 mm and a nominal aspect ratio not greater than 70%, and includes a tread 8 having a tread surface 4 that comes into contact with a road surface, and a belt 18 located radially inward of the tread 8. A ratio of a width of the tread surface 4 to a camber amount of the tread surface 4 at an end of the tread surface 4 is not less than 20 and not greater than 30. Regarding a thickness from the belt 18 to the tread surface 4, a ratio of a thickness at an equator plane to a thickness at an end 36 of the belt 18 is not less than 0.95 and not greater than 1.05.

Abstract: A tyre for a motorcycle for rough terrain comprises a tread portion. In a region between at least one of tread edges and a tyre equator, the tread portion is provided with middle blocks, shoulder blocks, and tie bars each connecting between one of the middle blocks and its adjacent one of the shoulder blocks. The shoulder blocks include first shoulder blocks forming the one of the tread edges and second shoulder blocks arranged on an inner side in a tyre axial direction of the one of the tread edges. The tie bars include first tie bars each connecting between one of the middle blocks and one of the first shoulder blocks and second tie bars each connecting between one of the middle blocks and one of the second shoulder blocks.

Abstract: Tire (1) for an agricultural vehicle, and more particularly the tread (2) thereof, has improved traction in the field, while reducing the sensitivity of the lugs (3) to attack by stubble. Each lug (3) comprises first lug portion (31), having height H1, and second lug portion (32), having height H2 and having a mean angle of inclination A2 with respect to circumferential direction (XX?) of the tire. The first lug portion (31) is comprised of a radial superposition of N layers C1i (33), where i varies from 1 to N, each having a height H1i, each layer C1i having a mean angle of inclination A1i strictly less than the mean angle of inclination A2, and, when N is strictly greater than 1, the angle A1j relative to a layer C1j, where j varies from 1 to N?1, is strictly less than the angle A1j+1 relative to the layer C1j+1.

Abstract: The present disclosure is directed to textile cords covered with a rubber composition of specified composition, tires having at least one component comprising the rubber-covered textile cords, and related methods for increasing aged cord coverage of rubber-covered textile cords and for preparing the rubber-covered textile cords. The rubber composition of specified composition includes silica filler in an amount of up to 20 phr and silane coupling agent in an amount of up to 5 phr.

Abstract: A tire includes a tire carcass, and a tread extending circumferentially about the tire carcass and including a noise-reducing tread pattern. The noise-reducing tread pattern includes a plurality of tread elements, with the tread elements having a first pitch length (1), a second pitch length (2), or a third pitch length (3). The noise-reducing tread pattern includes one of the following circumferential configurations: a circumferential row including 40 pitches, with 13 occurrences of “1,” 13 occurrences of “2,” and 14 occurrences of “3;” a circumferential row including 38 pitches, with 10 occurrences of “1,” 19 occurrences of “2,” and 9 occurrences of “3;” a circumferential row including 42 pitches, with 10 occurrences of “1,” 19 occurrences of “2,” and 13 occurrences of “3;” and a circumferential row including 44 pitches, with 11 occurrences of “1,” 20 occurrences of “2,” and 13 occurrences of “3.

Abstract: A tire for sand traction includes a ground-engaging tread that is disposed radially outwardly of a wheel. Structural elements extend radially between the wheel and the tread. The tread includes an inboard shoulder and an outboard shoulder. The tread is formed with a recess wall that extends laterally between the inboard shoulder and the outboard shoulder. The recess wall is disposed radially inwardly of the inboard shoulder and the outboard shoulder to form a central recess. The tire also includes a plurality of circumferentially-spaced, laterally-extending lugs. Each lug extends across the central recess from the inboard shoulder to the outboard shoulder.

Abstract: Tread (10) for agricultural tire (1) comprising a plurality of lugs protruding from the ground of the tread (11) in radially outer direction extending at a given inclination angle from a central portion of the tread toward both axial ends of the tread and alternately arranged at given intervals in the circumferential direction on one side and on the other with respect to the equatorial plane of the tire. The lugs (2) comprising a stepping-in surface (21) wherein the stepping-in surface (21) of at least one lug (2) comprises on its sidewall a first radially outer, concave surface (211) and a second, radially inner, concave surface (212) intersecting each other in a transition point (D) when viewed in a circumferential section.

Abstract: A tire includes a circumferential tread, a pair of beads, and a pair of sidewalls. The tire further includes a plurality of circumferential belts disposed below the circumferential tread and extending in an axial direction. The plurality of circumferential belts include a lower belt and an upper belt. The tire also includes at least one gum strip. The at least one gum strip has a first portion in contact with a top surface of the lower belt and a bottom surface of the upper belt. The at least one gum strip has a second portion disposed below the lower belt.

Abstract: A tire with improved uneven wear resistance has a designated tire rotation direction and includes inclined grooves in both halves of the tread surface divided by the tire equatorial plane, the inclined grooves extending inward in the tire width direction from the tread surface edge side, being inclined opposite the tire rotation direction, and being aligned in the tire circumferential direction; and an inter-inclined-groove land portion formed between each pair of inclined grooves that are adjacent in the tire circumferential direction. Along a land portion edge of the inter-inclined-groove land portion on the tire rotation direction side thereof, a point P1 located ¾ of the tread half-width from the tire equatorial plane in the tire width direction is positioned on the tire rotation direction side of a point P2 located ¼ of the tread half-width from the tire equatorial plane in the tire width direction.

Abstract: The present invention concerns a tire (10) comprising a tread (11) provided with a base surface (14) and with a plurality of ribs (12), each rib (12) being provided with a front wall and a rear wall, and a shaped profile (15), wherein the shaped profile (15) has a section that defines at least one flat surface (17) of the shaped profile (15) which is parallel, or inclined at an angle ? up to 20°, to the surface of the head (16) of the rib and which is joined to the front wall of the rib (12) by means of a connecting surface (18), at least one sharp angle (19) of the shaped profile (15) and at least one front wall (23) of the shaped profile (15), which is joint to the base surface (14) of the tread (11) by means of a connecting surface (21).

Abstract: A tread and tire for a multipurpose agricultural machine, that improves field traction while ensuring a satisfactory compromise with wear under engine torque and vibratory comfort on the road having a tread having a plurality of lugs distributed in a first row extending axially from a first axial end of the tread and in a second row extending axially from a second axial end of the tread, the second row differing from the first row by a symmetry relative to the equatorial plane of the tire followed by a rotation about the rotation axis of the tire, each row having an alternation of long lugs and of short lugs. The axially inner end face of a first long lug of a row of lugs is separated from the trailing lateral face of the second long lug of the symmetrical row of lugs, closest to the axially inner end face of the first long lug, by an end groove with a width at least equal to 10% and at most equal to 100% of the lug height.

Abstract: An elastomeric composition is provided comprising at least one elastomer, at least one cellulose ester additive, at least one methylene acceptor, at least one methylene donor, and optionally, at least one filler; wherein the cellulose ester additive comprises at least one cellulose ester. The cellulose ester additive can also comprise at least one compatibilizer and/or plasticizer.

Abstract: A process for producing elastomeric composition is provided comprising mixing at least one elastomer, at least one cellulose ester additive, at least one methylene acceptor, at least one methylene donor, and optionally, at least one filler; wherein the cellulose ester additive comprises at least one cellulose ester. The cellulose ester additive can also comprise at least one compatibilizer and/or plasticizer.

Abstract: Provided is a motorcycle tire (1) for traveling on rough terrain, the tire having a block (10) provided to a tread section (2). The block (10) has the following: a block lateral surface body part (15) that extends straight from the edge of a tread surface (12) inward in the tire radial direction; and a skirt section (20) that connects the block lateral surface body part (15) and a groove bottom surface (9). The skirt section (20) has the following: a flat section (21) that extends in a straight line on the groove bottom surface (9) side; and a curved section (22) that connects, in a beveled arc, the area between the flat section (21) and the block lateral surface body part.

Abstract: A non directional pneumatic tire is provided for an agricultural irrigation system. The tire includes first and second side walls and a radially outer wall defining an internal inflation chamber. A non directional tread pattern is defined on the tire and includes a plurality of longitudinal protrusions positioned substantially parallel to a rotational axis of the tire. The longitudinal protrusions are arranged in first and second rows extending from the first and second side walls toward and across the equatorial plane of the tire. The longitudinal protrusions of the first and second rows circumferentially alternate with each other and there is a circumferential spacing between adjacent longitudinal protrusions at the equatorial plane so that no portion of one longitudinal protrusion circumferentially coincides with or overlaps another.

Abstract: A tire tread having features that improve thermal wear performance is provided. A tread block is provided with an aperture. The aperture is positioned and sized in a manner that reduces stresses and/or strains in the tread block so as to reduce thermal wear. Certain variations in the depth and shape of the aperture are provided. Such tread feature can provide for a tire capable of operating at higher speeds for a given load.

Abstract: A non directional pneumatic tire is provided for an agricultural irrigation system. The tire includes first and second side walls and a radially outer wall defining an internal inflation chamber. A non directional tread pattern is defined on the tire and includes a plurality of longitudinal protrusions positioned substantially parallel to a rotational axis of the tire. The longitudinal protrusions are arranged in first and second rows extending from the first and second side walls toward and across the equatorial plane of the tire. The longitudinal protrusions of the first and second rows circumferentially alternate with each other and there is a circumferential spacing between adjacent longitudinal protrusions at the equatorial plane so that no portion of one longitudinal protrusion circumferentially coincides with or overlaps another.

Abstract: A multi-chamber tire manufacturing mold, comprising an upper holding plate and a lower holding plate having an interval between the upper holding plate and the lower holding plate; a tire periphery forming slider, a tire inner chamber forming slider, an upper mold block, a lower mold block, and a central mold post are arranged in the interval; the upper holding plate is connected to the plurality of upper mold blocks, and the lower holding plate is connected to a plurality of lower mold blocks, forming an enclosed chamber; the tire inner chamber forming slider arranged in the enclosed chamber, forming a flexible portion chamber and a partitioned chamber, such that isolating chambers are formed in the flexible portion; the openings of which together with the tire periphery forming slider form an enclosed chamber via process sealing members and fill the forming outer body.

Abstract: A pneumatic agricultural tire includes first and second rows of angled lugs. Each lug is provided with a leading wall rising up from a tread floor to a leading edge of the lug surface. The leading wall has a wedge shaped leading nose rising up from the tread floor and sloped in the trailing direction so that ground stubble is engaged by and pushed aside by the wedge shaped leading nose thereby reducing stubble damage at a root of the leading wall.

Abstract: An automatically traveling floor dust collecting appliance has at least one running wheel having an axis of rotation, a hub, and a tire forming a tire contact area merging radially inwardly into two oppositely situated side faces. The tire, which includes elastic material, has profile blocks, each forming a part of the tire contact area and provided one after the other in the peripheral direction. A running wheel is also provided, in particular for a floor dust collecting appliance. The part of the tire contact area formed by a profile block has a profile which in its cross-section slopes downwardly toward the center. This profile block at the same time forms a part of an associated side face. The profile block, at this transition, radially and in the direction of the axis of rotation, forms a farthest protruding portion of the tire contact area of the tire.

Abstract: A pneumatic tire for agricultural equipment or forestry equipment includes a circumferential tread, a pair of sidewalls, and a pair of bead portions. A steel reinforced radial carcass ply extends circumferentially about the tire. The carcass ply includes an axially inner portion and axially outer turn-up portions. First and second steel reinforced belts are disposed between the carcass ply and the circumferential tread. Axial ends of the belts are separated by belt wedges. The tire includes a pair of sidewall inserts. Each sidewall insert extends continuously from an upper end extending between the first belt and the carcass ply, through a sidewall region of the tire, to a lower end extending between the inner portion of the carcass ply and one of the turn-up portions of the carcass ply. A tie gum layer binds an inner liner to the carcass ply.

Abstract: A farm vehicle tire (1) having a tread (2), which has a toroidal base surface (3), and a number of lugs (5), each extending radially outwards from the base surface (3) and having a front wall (6) and a rear wall (7) with respect to a given rolling direction (8); the leading edge (11), with respect to the rolling direction (8), of the section of each lug (5) along any plane (12) perpendicular to an axis (4) of rotation of the tire is in the form of an involute curve outward of the base surface (3).

Abstract: A tire (1) for a motorcycle has: a groove portion (10) formed at a tread; and a block-shaped land portion (100) protrusive from the groove portion (10) toward an outside in a tire radial direction (TD). The land portion (100) has a plate-shaped small piece portion (107). Since an area with which the running wind comes into contact increases due to the small piece portion (107), the periphery of the groove portion (10) or the land portion (100) can be effectively thermally radiated. Thus, a temperature of the land portion (100) can be reduced, and even if the automatic motorcycle runs on the hard road surface over a predetermined period of time or more, it is possible to effectively restrain the lowering of required performance such as gripping force, feeling of grounding, and steering stability, which is exerted by the lowering of the rigidity of the land portion.

Abstract: An agricultural tire has an equatorial plane separating first and second sides. First and second inner sixths of the treads extend between the equatorial plane and circumferential reference planes disposed axially one-sixth of a tread width on either side of the equatorial plane. First and second middle sixths of the tread extend between inner circumferential planes and middle circumferential reference planes one-sixth of the tread width from the inner circumferential reference planes. Outer sixths extend between the middle circumferential reference planes and outer circumferential reference planes disposed one-sixth of the tread width from the middle planes. Net tread volume ratio is approximately 40 percent, where between 36 and 39 percent of lug volume is in the inner sixths, between 32 to 35 percent in the middle sixths, and 27 to 30 percent in the outer sixths of the tread.

Abstract: A tire for a construction vehicle according to the present invention provides a tire for a construction vehicle having a belt formed by plural layers on the radially outer side of a crown portion of a carcass toroidally extending between a pair of bead portions, in which an outermost belt layer located on the radially outermost side of the belt has a width of 50% or more of a tread width, and a narrow groove is provided such that a distance between an end portion of the outermost belt layer and a bottom portion of the narrow groove is in the range of 15% to 100% of a tread thickness T, where T is a tread thickness at the end portion of the outermost belt layer.

Abstract: A green tire includes a carcass and a pre-shaped tread. The carcass includes a pair of annular beads and at least one body ply extending between the pair of annular beads. The carcass further includes a circumferential belt. The pre-shaped tread includes a plurality of tread segments, wherein each of the plurality of tread segments includes at least one bar and at least one void.

Abstract: Methods of making tires with features such as ribs, lugs, or tread blocks include shaping at least one feature onto an uncured tire tread prior to vulcanization. One aspect of these methods may include shaping a feature onto the tread while the tread is associated with the tire. Shaping devices may include shaping rollers, stitching rollers, pre-molds, and annular, curved, or flat stamping plates. An additional aspect of these methods may further reduce the amount of air between a tread and carcass prior to vulcanization. These methods may be used in conjunction with manufacturing processes used on various types of tires, and are particularly suitable for use in large tire manufacturing processes.

Abstract: A center block and a second block that satisfy h1/H=0.05 to 0.4 and w1/W=0.05 to 0.4 are formed on a tread, where H is the block height, h1 is the drop in height of a chamfered part, w1 is the breadth of the chamfered part and W is the length of the block tread in a circumferential direction. When traveling on hard pavement, the chamfered part of the block contacts the hard pavement first and, compared to a case in which an edge that does not have a chamfered part contacts a hard pavement, the ground-contact surface area can be increased and steering stability on hard pavement can be improved. Further, in rough terrain, resistance received from a road surface at the time of ground contact is reduced, travel resistance is suppressed and steering stability is improved.

Abstract: An agricultural tire has an equatorial plane separating first and second sides. First and second inner sixths of the treads extend between the equatorial plane and circumferential reference planes disposed axially one-sixth of a tread width on either side of the equatorial plane. First and second middle sixths of the tread extend between inner circumferential planes and middle circumferential reference planes one-sixth of the tread width from the inner circumferential reference planes. Outer sixths extend between the middle circumferential reference planes and outer circumferential reference planes disposed one-sixth of the tread width from the middle planes. Net tread volume ratio is approximately 40 percent, where between 36 and 39 percent of lug volume is in the inner sixths, between 32 to 35 percent in the middle sixths, and 27 to 30 percent in the outer sixths of the tread.

Abstract: An off-road motorcycle tire 1 having an improved cracking resistance, comprising a tread portion 2 having a plurality of blocks B, wherein at least one of the blocks B has a shallow groove 17 having a depth D1 of 10 to 50% of a height H1 of the blocks B to provide a shallowly-grooved block 16 in which the block is divided into at least two block segments 16s by the shallow groove 17, the shallow groove 17 has both ends opened on outer wall surfaces 12 of the shallowly-grooved block 16 and it has groove wall surfaces 17w extending radially inwardly from a tread surface 11 of the block and a bottom 17b connecting the groove wall surfaces 17w, and intersection portions 18 between the bottom 17b and the outer wall surfaces 12 are chamfered to form chamfered portions 19 having a convex circular arc-like curved surface.

Abstract: The semi-hollow pneumatic tire (10) has an axis of revolution and comprises a sole (20) capable of being mounted on the periphery of a rotary support (12), a tread (24) opposite the sole (20), and two sidewalls (26) each connecting the sole and the tread so as to form together a cover (28) which defines an uninflated chamber (30) inside the pneumatic tire.

Abstract: A system is provided for refitting a tire system on a four-wheel-drive compact tractor which typically comes equipped with a set of industrial tires mounted on standard industrial size wheels. The tractor has a frame size falling within an industry classification of extra large frame, large frame, mid-frame or small frame. A set of replacement agricultural tires or turf tires is provided. The industrial tires are replaced with the replacement agricultural tires or turf tires without changing at least the front wheels on the compact tractor. The replacement tires are selected so as to maintain a front tire overspeed within manufacturer specified ranges for the majority of tractors falling within the industry classification.

Abstract: Tire and tread for a vehicle for agricultural use having reduced attack to leading faces of tread bars, at axially outer ends thereof, by stubble remaining after harvest, thereby reducing risk of chunking of axially outer ends of the bars. The tire and tread has a plurality of bars, a bar having, in any axial plane (Pxy) parallel to the axis of rotation, a leading profile and a trailing profile. The angle (A) of the straight line (T) tangential to the leading profile at a point (M) on the leading profile, with respect to an equatorial plane (P), increases continuously, from an axially outermost point (E) of the leading profile, when the axial distance (L) between the point (M) and the point (E) increases, the angle (A) reaches a maximum value (Am) at a point of inflection (I) of the leading profile, and the radius of curvature (R) at any point (M) , positioned axially between the axially outermost point (E) and the point of inflection (I), is at least equal to 0.4 times the height of the bar.

Abstract: A pneumatic tire has two circumferential-direction main grooves (13) and lug grooves (15). The circumferential-direction main grooves are disposed outside quarter point sections of a tread contact width (TW) in a tread width direction, respectively, the two circumferential-direction main grooves extending in a tire circumferential direction, each of the quarter point sections of the tread contact width (TW) being a midpoint between a tire equator line and a corresponding tread end portion. The lug grooves are extended outwardly from the circumferential-direction main grooves in the tread width direction. Each quarter point section of the tread contact width (TW) has a rib-like shape continuously extending in the tire circumferential direction.

Abstract: An agricultural machine having a first frame and a roller with a tube mounted about a first axis. A second frame is connected to the first frame and a wheel, which includes a rim mounted about a second axis. The wheel has a tire and the roller has a covering around the tube. The covering and the tire tread have moldings defining a pattern element repeated in a transverse direction parallel to the first axis and to the second axis, respectively. The pitch of transverse repeat of the pattern element of the roller and the pitch of transverse repeat of the pattern element of the wheel are equal to the nearest 10%. The pattern elements define ribs the height of which on the roller and the height of which on the wheel are equal to the nearest 90%.

Abstract: A “D speed” agricultural tire for self-propelled agricultural equipment can intermittently travel on the highway at speeds up to 40 mph. A sub-tread layer of high natural rubber content compound is placed between the tread and the polyester belts of the tire to aid in reducing internal heat generation adjacent the belts.

Abstract: A pneumatic agricultural tire includes first and second rows of angled lugs. Each lug is provided with a leading wall rising up from a tread floor to a leading edge of the lug surface. The leading wall has a wedge shaped leading nose rising up from the tread floor and sloped in the trailing direction so that ground stubble is engaged by and pushed aside by the wedge shaped leading nose thereby reducing stubble damage at a root of the leading wall.

Abstract: A pneumatic tire for agricultural equipment or forestry equipment includes a circumferential tread, a pair of sidewalls, and a pair of bead portions. A steel reinforced radial carcass ply extends circumferentially about the tire. The carcass ply includes an axially inner portion and axially outer turn-up portions. First and second steel reinforced belts are disposed between the carcass ply and the circumferential tread. Axial ends of the belts are separated by belt wedges. The tire includes a pair of sidewall inserts. Each sidewall insert extends continuously from an upper end extending between the first belt and the carcass ply, through a sidewall region of the tire, to a lower end extending between the inner portion of the carcass ply and one of the turn-up portions of the carcass ply. A tie gum layer binds an inner liner to the carcass ply.

Abstract: A tire includes a tire carcass and a tread extending circumferentially about the tire carcass The tread includes a plurality of tread elements disposed in a tread pattern. The plurality of tread elements have one of two different pitch lengths and are disposed in a noise-reducing pitch sequence.

Abstract: The present invention provides a pneumatic tire in which the tread pattern is optimized to improve wear resistance.

Abstract: A tire includes a tire carcass and a tread extending circumferentially about the tire carcass. The tread includes a plurality of tread elements disposed in a tread pattern The plurality of tread elements have one of two different pitch lengths and are disposed in a noise-reducing pitch sequence.

Abstract: A tire tread intended to be fitted on heavy vehicles, comprising a plurality of elements in relief (30), this tread being divided in the axial direction into three parts, a central part (33) and axially on either side a first edge (31) and a second edge (32), the first and the second edge parts comprising elements in relief (30) arranged at a pitch Pe corresponding to the average circumference of the edge in question divided by the number of elements in relief on the edge in question, the elements in relief of each edge part having a line of leading ridges and a line of trailing ridges.

Abstract: The present invention comprises a wheel assembly for use on a tower of an irrigation system. The wheel assembly comprises a generally cylindrical wheel having a hub, one or more spokes and a rim to which a plurality of non-pneumatic tire sections are mounted to encircle and effectively cover the circumferential outwardly facing surface of the rim. The tire segments are typically solid and comprised of a resilient polymeric material such as polyurethane.

Abstract: A pneumatic tire includes a wide cross belt having a width not smaller than 92% and not lager than 100% of a width of a tread; and a narrow cross belt having a width smaller than that of the wide cross belt and a tire width direction outer end positioned on a tire width direction outer side with respect to a tire width direction inner edge of an outermost land portion. The tread has open sipes penetrating through the outermost land portion in the tire width direction and formed along the tire circumferential direction, and lug grooves extending along the open sipes on a contact surface of the outermost land portion and having a tire width direction outer end positioned between a tire width direction outer end of the wide cross belt and the tire width direction outer end of the narrow cross belt.

Abstract: A pneumatic tire which prevents one-sided biased abrasion from being generated, the pneumatic tire having a non-directed rotational direction and comprises lug grooves 20 cutting across a land portion at a shoulder side of a tread portion 16 at both sides in a tire width direction. Each of the lug grooves 20 has a tapered groove portion 21 such that the groove width gradually becomes narrower such that a trapezoidal block portion 22 having a short side at the shoulder side as seen from a tire tread surface side is formed between the lug grooves 20 in a tire peripheral direction. The tapered groove portion 21 is formed so as to extend beyond a one quarter point Q from a tread end T. Accordingly, since in whichever direction the pneumatic tire 10 is rotated, a lug angle ? of a trailing end near the one quarter point Q becomes 90 degrees or less, it is possible to prevent one-sided biased abrasion from being generated.