Abstract: A wheel for vehicles includes: a rim and a tyre mounted on the rim and inflated to an operating pressure; axial end portions of a tread band of the tyre radially spaced apart the same distance from a rotation axis of the wheel and a median circumferential line of the tread band axially shifted by a predetermined distance relative to a mid-line plane of the wheel; the wheel mounted on a car with a camber angle substantially zero and with the median circumferential line shifted toward the outside of the car relative to the mid-line plane.

Abstract: A pneumatic radial tire includes a pair of annular bead portions 2A, 2B, a tread portion 3 having a tread surface portion, a pair of sidewall portions 4A, 4B each connecting one of both end portions of tread portion 3 in tire-width directions and an outward end in the tire-radial direction of the corresponding one of the bead portions 2A, 2B, and a carcass layer 5 extending continuously across and through the bead portions 2A, 2B, the sidewall portions 3, and the tread portion 4A, 4B, the carcass layer 5 being configured to form a framework of the tire.

Abstract: A proper balance between ride comfort, steering stability, and road noise is achieved. A pneumatic tire (1) has a band layer (9) comprising a band ply (9A) where band cords are arranged at an angle of not more than 5 deg. with respect to the circumferential direction of the tire on the radially outer side of a belt layer (7). The band ply (9A) comprises a first ply piece (9a) covering only one side of end portions of the belt layer (7) and a second ply piece (9b) disposed adjacently to the first ply piece (9a), covering continuously the central portion of the belt layer (7) and another side of the end portions, and having a width larger than that of the above-mentioned first ply piece (9a). And, the band cords of said first ply piece (9a) and band cords of said second ply piece (9b) are different in modulus.

Abstract: A pneumatic tire including: a tread portion and a belt layer on an outer periphery of a carcass layer that extends between left and right bead portions and a plurality of circumferential main grooves extending in a tire circumferential direction provided on an outer surface of the tread portion, wherein on a tire cavity side surface of the tread portion, a ridge (Ra) protruding into the tire cavity side in a direction opposite to a tire radial direction is formed that extends in the tire circumferential direction in a position offset from a tire center towards a well side of a mounting rim so as to encompass an entire width of a well and an entire width of a circumferential main groove positioned farthest to a shoulder side.

Abstract: A pneumatic radial tire includes a pair of annular bead portions 2A, 2B, a tread portion 3 having a tread surface portion 3a, a pair of sidewall portions 4A, 4B each connecting one of both end portions in the tire-width directions of the tread portion 3 and an outward end in the tire-radial direction of the corresponding one of the bead portions, and a carcass layer 5 extending continuously across and through the bead portions, the sidewall portions, and the tread portion, the carcass layer being configured to form a framework of the tire.

Abstract: A method for manufacturing a tyre includes: assembling an unvulcanized tyre, the tyre including a crown, a first sidewall and a first bead, a second sidewall and a second bead, and a carcass reinforcement, each bead including a seat; and vulcanizing the unvulcanized tyre in a mould having an asymmetric configuration in order to obtain a vulcanized tyre, wherein the mould is such that, when the tyre is placed in the mould, in any meridian section, the seat of the first bead has an angle ?1 with a rotation axis A and the seat of the second bead has an angle ?2 with the rotation axis A, such that ?1??23, with the angles ?1 and ?2 being expressed in degrees, with the angles ?1 and ?2 being defined, for each bead, relative to an axis Ox and Ox? parallel to the rotation axis A oriented positively towards outside of the tyre, and with the angles ?1 and ?2 being positive when extending radially outwards.

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 1 according to the invention has bead portions 11, 12 including bead cores 11a, 12a, and at least a carcass layer 13 and a tread portion 16 arranged, wherein in a section in a tire-width direction, assuming as a reference a tire centerline CL making right angles with a bead line BL interconnecting a center of the bead core 11a and a center of the bead core 12a, and passing a center of the bead line BL, an outer ground-contact area 20B is wider by 5 to 15% than an inner ground-contact area 20B, and wherein in the section in the tire-width direction, a carcass periphery length as a distance along a carcass centerline CaL from a crossing point P to an approach point P2 is longer by 0.5 mm to 10 mm than a carcass periphery length Ca as a distance from the crossing point P to an approach point P1.

Abstract: A pneumatic tire according to the present invention includes bead units and a carcass layer at least. The bead units includes an inside bead core and an inside bead filler located in an inside under an equipment on a vehicle, and an outside bead core and an outside bead filler located in an outside. The carcass layer includes a main body and turnbacks. The main body extends from the inside bead core to the outside bead core. Each of the turnbacks is turned back from the inside bead core or the outside bead core to an internal side of a belt layer. Here, each edge of the turnbacks provided at a tire inner peripheral side of the belt layer is located inside from each edge of the belt layer in a tread width direction. In addition, a height of the outside bead filler is lower than a height of the inside bead filler in a cross section along the tread width direction.

Abstract: A tire is provided that includes a crown with a mid-plane S, two sidewalls, a first bead, of diameter ?1, intended to be positioned on the outboard side of a vehicle, and a second bead, of diameter ?2, intended to be positioned on the inboard side of a vehicle, such that ?1>?2. When the tire is mounted on its working rim and inflated to its nominal pressure, the mid-plane S of the crown is axially offset towards the first bead relative to a mid-plane B of the beads by a positive or zero distance D.

Abstract: A pneumatic radial tire has a carcass and a tread. The carcass has at least one carcass reinforcing ply and opposing bead portions. Each bead portion has a bead core and a bead apex radially. The apexes in each bead portion having the same radial height (HA), as measured from a bead base line (B). The tire has a bead reinforcing ply comprising aramid fiber reinforcing cords located in only one bead portion of the tire, with the bead reinforcing ply being adjacent to the carcass reinforcing ply.

Abstract: A method and system for calibrating speed of a vehicle having a plurality of wheels includes a wheel speed sensor coupled to each of the wheels for providing a first vehicle speed based on an average tire size associated with the plurality of wheels. A GPS sensor provides a second vehicle speed based on a change in position of the vehicle over a predetermined period of time. A control module automatically calibrates the speed of the vehicle based on a comparison of the first and second vehicle speeds.

Abstract: A pneumatic run-flat tire has a bead configuration wherein the axially inner end is radially inward of the axially outer end of the bead. The sidewall of the tire, from the bead region to the upper sidewall is reinforced to form a pillar support in the sidewall. The bead configuration and the pillar reinforcement enable the tire to lock itself onto a tire rim during low pressure operation and be self-supporting.

Abstract: A pneumatic tire is capable of operation during underinflated condition and the construction of sidewalls are configured to compensate for negative cambers acting upon the tire. The inboard side of the tire is softened in comparison to the outboard side of the tire. This is achieved by either forming an asymmetrical tire in either the tire profile or the internal construction.

Abstract: Disclosed are improved wheels and tires for simulating the appearance of larger-diameter wheels mounted within low-profile tires. The improved tires are intended to be mounted on wheels with an extended outer flange. An embodiment of the tire comprises an outboard tire wall, an inboard tire wall, a tread therebetween, a laterally extending wheel protector, a ledge, and a flange seat. The flange seat is optionally contoured to match the inner face of an outer flange of the improved wheel.

Abstract: An improved truck racing tire includes three belts and reduced tread and undertread thickness for weight reduction. An asymmetric shoulder design is provided and circumferential grooves having wear indicia therein at a preselected depth are incorporated into the tread to divide the tread into plural ribs. Notches are formed within the tread ribs in circumferential patterns of distribution at a depth equivalent to the depth of groove tread wear indicators. The tread is constructed of a relatively softer compound in the cap and a relatively harder compound in the base. The boundary between the cap and the base is at a depth corresponding to the notch depth and the wear indicators within the grooves to provide a further indication and confirmation of wear pattern and magnitude.

Abstract: A tire for vehicles carrying heavy loads, comprising in at least one bead an additional reinforcement composed of a plurality of discontinuous reinforcing elements, these discontinuous reinforcing elements being orientated essentially circumferentially to form a plurality of circles C, C1, C2 concentric on the rotation axis of the tire mounted on its rim, each circle being defined by a mean radius (R, R1, R2) measured relative to the said rotation axis.

Abstract: A tire comprising two beads, a crown and sidewalls that connect the crown to said beads, the tire being reinforced by a carcass reinforcement anchored in each bead to at least one annular anchoring element, each sidewall comprising an additional, inextensible sidewall ring located axially inside the axially outermost carcass ply and a coupling section located radially between the annular anchoring element in the bead and said sidewall ring and positioned axially inside the axially outermost carcass ply. The tire is characterized in that the line segments passing through the centers of gravity of the sections of the annular anchoring rings in the beads and through the center of gravity of the sidewall rings on the same respective side, make angles respectively of ?1 and ?2 relative to the rotation axis, these angles being different.

Abstract: A tire comprising a carcass extending through sidewall regions and a ground contacting tread region and a tread reinforcing breaker disposed radially outward of the carcass in the tread region, inboard and outboard tread regions each extending between the tread circumferential centerline (X) and axially spaced-apart inboard and outboard tread edges (IE,OE), the inboard tread edge (IE) for mounting nearest to the vehicle longitudinal centerline, characterised in that in the condition that the tire is mounted on its scheduled wheelrim and inflated to its scheduled pressure, the axial width (LR) of the tread between its tread edges (OE, IE) is not less than 75% of the maximum tire width (G), the axial width (LC) of the breaker is not less than 97% of the tread width (LR) and the difference in the breaker width (LC) and the tread width (LR) is not more than 25% of the difference between the maximum tire width (G) and the tread width (LR).

Abstract: A tire comprising two beads, a crown and sidewalls that connect the crown to said beads, the tire being reinforced by a carcass reinforcement anchored in each bead to at least one annular anchoring element, each sidewall comprising an additional, inextensible sidewall ring located axially inside the axially outermost carcass ply and a coupling section located radially between the annular anchoring element in the bead and said sidewall ring and positioned axially inside the axially outermost carcass ply. The tire is characterized in that the line segments passing through the centers of gravity of the sections of the annular anchoring rings in the beads and through the center of gravity of the sidewall rings on the same respective side, make angles respectively of &bgr;1 and &bgr;2 relative to the rotation axis, these angles being different.

Abstract: A pneumatic radial tire has a tire meridian cross-sectional configuration of a tread surface portion on at least one side of the tire center line which is arranged such that, when a position A is an intersection of the tire center line and the tread surface, and when a position B is an intersection of a straight line P drawn orthogonal to the tire axis from an edge of an innermost belt layer and the tread surface, an angle &agr; between a straight line X connecting the positions A and B and a straight line Y drawn perpendicular to the tire center line from the position A is set in a range of 8 to 10 degrees, when the pneumatic radial tire is attached to a standard rim specified in JATMA with its air pressure being 180 kPa and with no load applied thereto.

Abstract: By shifting the peak height of the tread on one side of the tire from the centerline (CL), for a tire intended for cambered use on a vehicle and/or exposure to lateral loading, improvements in the footprint shape, pressure distribution, area and footprint shape factor (FSF) are obtained. In an illustrated embodiment, 0.127 cm to 5 cm (deep) of mold material are removed from one side of the centerline (CL) of the crown in a conventional mold, at 15% to 85% of the distance from the centerline to the shoulder area of the mold (one-half inch to five and one-half inches in the illustrated tires), to obtain a mold shape having the designated change in tread peak height.

Abstract: A tire having a radial carcass reinforcement winding within each bead around at least one heel reinforcement element and whose meridian profile, when the tire is mounted and inflated, has a constant direction of curvature in a first bead and a sidewall extending it radially, and has a tangent TT′ to the point of tangency T of the carcass reinforcement profile with the annular element of the first bead which forms with the axis of rotation an angle &phgr; which is open towards the outside and is greater than 45°, wherein, viewed in meridian section, at least the aforesaid sidewall comprises a reinforcing profiled element having, viewed in section, substantially the form of a crescent, one of the axially inner or outer faces of the crescent-shaped profiled element follows the profile of the carcass reinforcement, and the trace of the face of the crescent-shaped profiled element opposite the face of such profiled element closest to the carcass reinforcement has a single direction of curvature.

Abstract: A pneumatic tire for heavy duty use applications, having at least one sidewall of formed an increased thickness, for providing better tire sidewall wear and increased re-use of the tire's internal carcass, the tire's enhanced thickness sidewall having a relief area formed by at least one radius relief portion adjacent that sidewall's bead to prevent the associated rim flange edge from cutting into the enhanced thickened sidewall, and a sharp angled return sidewall portion adjacent the portion tread sidewall. The increased thickened sidewall, ranging between approximately 2.0 and 3.5 inches, provides maximum thickness in the area of maximum sidewall flexing during use.

Abstract: A vehicle tire comprises a carcass ply (1) extending between two bead regions, a tread region disposed between side walls (7,8) and having a tread surface (6) curved in the axial direction and also a breaker (5) reinforcing the tread region and arranged between the carcass ply and tread region, characterised in that in the normally inflated state of the tyre mounted on a tyre rim, the vertical spacing of the tread surface (6) with respect to the breaker continuously reduces, starting from the region of the tyre centre (3), towards the breaker edges (13, 14) and in that the side walls (7, 8) are made at least substantially self-supporting.

Abstract: A vehicle tire is described having at least one carcass ply extending between bead regions, a tread region (1) and a belt arrangement (3) disposed between the carcass and the tread as well as a tread profile provided in the tread region having at least one overwide circumferential groove (2) disposed in particular away from the middle and on the inner side of the tire, with the tire region disposed beneath the overwide circumferential groove, which has in particular a width of more than 30 mm, being formed with additional localised reinforcement in the axial direction.

Abstract: A heavy-duty pneumatic radial tire and rim assembly ha s a support ring within the tire to support the tire in a deflated condition, wherein the inner diameter Di of the inside bead portion which is inside with respect to the vehicle is substantially 80 to 200 mm larger than the inner diameter Do of the outside bead portion.

Abstract: By shifting the peak height of the tread on one side of the tire from the centerline (CL), for a tire intended for cambered use on a vehicle and/or exposure to lateral loading, improvements in the footprint shape, pressure distribution, area and footprint shape factor (FSF) are obtained. In an illustrated embodiment, 0.127 cm to 5 cm (deep) of mold material are removed from one side of the centerline (CL) of the crown in a conventional mold, at 15% to 85% of the distance from the centerline to the shoulder area of the mold (one-half inch to five and one-half inches in the illustrated tires), to obtain a mold shape having the designated change in tread peak height.

Abstract: A tire having at least a first bead, the seat of which has a generatrix whose axially inner end lies on a circle of diameter greater than the diameter of the circle on which the axially outer end is located, and a radial carcass reinforcement winding within each bead around at least one heel reinforcement element, passing from the inside to the outside to form an upturn, the meridian profile of the carcass reinforcement, when the tire is mounted on its operating rim and inflated to the recommended pressure, having a constant direction of curvature in the first bead and a sidewall extending it radially, and having a tangent TT′ to the point of tangency T of the carcass reinforcement profile with the annular element of the first bead which forms with the axis of rotation an angle &phgr; which is open towards the outside and is greater than 45°, wherein, viewed in meridian section, at least the sidewall extending the first bead comprises a reinforcing profiled element having, viewed in section, substan

Abstract: A tire has a radial carcass reinforcement having a bead, the seat of which is inclined towards the outside, the bead heel axially to the inside and reinforced by at least one reinforcement element, the bead toe axially to the outside and having a profiled element of rubber mix in the form of a wedge defined by two sides, the mix having a Shore A hardness greater than the Shore A hardness of the rubber mixes radially above, wherein the reinforcement winds around the annular element to form an upturn, the end of which is located axially to the outside of a straight line P2 perpendicular to the axis of rotation and passing through the center of gravity of the meridian section of the element, and axially to the inside and radially to the outside of the straight line P1 supporting the radially outer side of the profiled element.

Abstract: The loss of tire contact patch area along the tire's inside shoulder, relative to an oval race course, which occurs during chassis roll and lateral deflection, is reduced by providing an asymmetrical molded tire. The tires are defined by an asymmetrical outer tread profile and the tires are mounted on the rear axle of the race vehicle such that the axially outer portion of the asymmetrical tread region of each tire, relative to the race course, has a greater shoulder drop, wherein the shoulder drop is the difference between the maximum radial diameter of the tread measured on the outer tread contour and the diameter of the tread at the tread edge, than the opposing tire shoulder.

Abstract: A pneumatic tire for a multiple-tracked vehicle is asymmetrical and has a convex tread section that is curved radially inward and extends to a tire sidewall.

Abstract: A tire wheel for vehicles comprises a mounting rim which can be associated with a hub of a vehicle and is provided with two bead seats forming a cone, for engagement with corresponding beads of a tire, with its apex on said axis of rotation in a position axially outside said rim, a tire comprising a toroidal carcass provided with a crown portion connected to a pair of axially facing sidewalls terminating in beads for engagement with the corresponding bead seats formed on the rim, said tire having its maximum width in the region of said beads, and an inner tube inserted into the toroidal cavity defined between tire and rim, elastically expandable by means of the introduction of fluid under pressure into its internal volume, and provided with an inflating and deflating device inserted in the wall of said inner tube, without any element for connection to the environment outside the wheel, in particular passing through the wall of the rim.

Abstract: A tire with a radial carcass reinforcement, when viewed in meridian section, includes a first bead, the seat of which is inclined towards the outside, the heel of the bead being axially on the inside and being reinforced by at least a reinforcement ring, the toe of the bead being axially on the outside and having a rubber wedge section made of rubber mix, the wedge being defined by two sides, the said rubber mix having a Shore A hardness greater than the Shore A hardness(es) of the rubber mixes located axially and radially above the bead ring and above the rubber wedge section.

Abstract: A pneumatic tire for a sand car including a reinforced carcass having a tread support portion and opposed sidewalls, and a body of elastomeric material vulcanized to the carcass defining an asymmetric tread. The tread includes a single, generally radially extending lug surface laterally offset from the center plane of the tire and extending around its outer periphery.

Abstract: A tire having a decreasing profile diameter includes an outside sidewall with a greater height than the inside sidewall. The inner diameters of each sidewall are preferably identical. The outer diameter of the outside sidewall is greater than the outer diameter of the inside sidewall. The cross-section of the width of the tread has a substantially constant thickness from the inside tread diameter to the tread surface of the tire. The depth of the tread is preferably constant across the width of the tread surface.

Abstract: A tire has a carcass reinforcement (1) which, when viewed in meridian secn, is wound in each bead B about a bead wire (2) coated with a rubber mix, passing from the heel to the toe of the bead B, the upturn (10) being located in a profile (3) of rubber mix in the form of a wedge defined by two sides (31 and 32) coming from an apex A located beneath the section of the coated bead wire (2). Advantageously the upturn (10) surrounds in its entirety the contour of the profile (3), forming either a first radially inner side (32), a lateral side (30), and a final radially outer side (31) or a first radially outer side (31), a lateral side (30), and a final radially inner side (32). The tire may form with different rims J high-performance assemblies in the event of travel at low or zero pressure, permitting simple mounting of the tires and optionally of bearing supports S for the tire tread on the rims J.

Abstract: A pneumatic radial tire has a carcass extending around the tire from bead-to-bead, sidewalls and a rubber tread region which has a profile, when considered in transverse cross section, of a new tire terminating at the sides of the tread in inner and outer shoulder regions, respectively, each shoulder region having a shoulder drop, which is the distance, in the radially inward direction, from the point of maximum tire diameter to a point of the shoulder at the edge of the shoulder region, such that when the tire is mounted on a scheduled wheel rim and inflated to a scheduled pressure, the tread region is asymmetric, having its point of maximum tire diameter offset in the axial direction of the tire from the center line of the tire section in the direction of the inner shoulder, and the shoulder drop of the outer shoulder is greater than the shoulder drop of the inner shoulder such that the tread region has an asymmetric profile, wherein the tread region has a substantially constant tread gauge or thickness exc

Abstract: A pneumatic tire comprises a radially inner bead core disposed in at least one of the bead portions, a radially outer bead core disposed radially outside the inner bead core, a buffer rubber layer disposed between the radially inner bead core and radially outer bead core to provide a predetermined space therebetween, and a toroidal carcass extending between the bead portions through the tread portion and sidewall portions, wherein the carcass comprises a ply of cords turned up around the radially outer bead core to be secured thereto, passing between the radially outer bead core and the buffer rubber layer, so that a radially outward tension of the carcass caused by tire inflation acts less on the radially inner bead core than the radially outer bead core.

Abstract: An inline roller skate includes a large number of small, light weight wheels arranged along a downwardly convex arcuate line to form a rocker. Braking elements are disposed along a common axis with at least some of the wheels, the braking elements may take the form of various surfaces of revolution, such as conical, cylindrical, ellipsoidal or semispherical. The braking elements are arranged to contact the skating surface when the skater shifts his foot to a direction perpendicular to his direction of movement and leans back on his skate so as to perform an "ice skating" type braking action.

Abstract: An inline hockey roller skate and wheel which includes braking and tread elements. The two elements have surfaces formed of a tough resilient material, such as urethane, disposed over a strong cage like frame. The frame and the tough resilient material provide a tread element which is a relatively hard surface so as to provide a fast wheel. The tread element is formed with an air chamber in the tough resilient material so as to be more easily deformable during the braking action. The braking element is arranged to contact the skating surface when the skater shifts his foot to a direction perpendicular to his direction of movement and leans back on his skate so as to perform an "ice skating" type braking action. The braking element is thus deformed and flattened against the skating surface to provide a larger foot print to improve gripping the surface for better cornering and ice hockey type stops.

Abstract: A tire (1), a mounting rim (2) therefor and a circumferentially unstretchable ring (3) for supporting the tread (10) of the tire when running at low or zero pressure. The tire (1) has a radial ply casing (13) on which the points that are furthest apart axially are radially apart close to seats (12B) of outwardly sloping beads (12). The seats (12B) engage sloping seats (23', 23") on the rim (2), which may have at least one mounting well (22), at least one cylindrical portion (21) for receiving the supporting ring (3) and a rim flange (24).

Abstract: A vehicle wheel has a wheel rim with a radially inwardly positioned mounting surface and rim flanges connected axially to opposite ends of the the mounting surface. A pneumatic vehicle tire with a carcass including at least one carcass ply is provided. The pneumatic vehicle tire has a tread and two sidewalls. The pneumatic vehicle tire is mounted on the inner mounting surface of the wheel rim so as to substantially enclose the mounting surface of the wheel rim. The rim flanges have a radially outwardly projecting end portion serving as axial contact surfaces for a respective one of the sidewalls.

Abstract: A pneumatic tire comprises a carcass extending around the tire from bead to bead, sidewalls and a rubber tread region which has a profile when considered in transverse cross section of a new tire terminating the sides of the tread in inner and outer shoulder regions respectively, each of said shoulder regions having a shoulder drop, which is defined by the distance in the radially inward direction from the point of maximum tire diameter to a shoulder point at the edge of the shoulder region, wherein when the tire is mounted on a scheduled wheelrim and inflated to a scheduled pressure, the tread region has its point of maximum tire diameter offset in the axial direction of the tire from the center line of the tire section in the direction of the inner shoulder, and the shoulder drop of the outer shoulder is greater than the shoulder drop of the inner shoulder such that the tread region has an asymmetrical profile.

Abstract: A pneumatic tire the aspect ratio of which is not more than 50% has, for reinforcing a tread portion, a belt comprising at least two rubber coated cord layers having cords arranged obliquely at angles with respect to an equatorial plane of the tire of 26.degree. or more, and a belt reinforcing layer arranged outside the belt and comprising at least one organic fiber cord layer having cords arranged substantially parallel with respect to the equatorial plane of the tire. The tire is molded in a mold with a cross-sectional profile of a molded surface facing the tread portion having a radius smaller than that of a nominal tire cross-sectional profile by 1% or more of a section width of the tire and forming a convex curve to a cavity.

Abstract: A pneumatic tire has a tread part with two wide circumferential grooves extending in either side of the tire's equator so as to divide the tread part into a pair of shoulder parts and a central part. The central part has a surface utilizing successive convex curves of a pair of inner groove walls and a central ground-contact surface. When the tire is mounted on a regular rim, inflated with regular internal pressure and applied with normal load, a ground-contacting area Fc where the central part contacts with the ground has a length Lc in the tire's circumferential direction which is 0.9 to 1.1 times a length Ls in the tire's circumferential direction of a ground-contacting area FS where the shoulder part contacts with the ground.

Abstract: A new pneumatic radial ply truck tire 10 for use on steering axles is disclosed. The tire 10 has a 20 tread having a plurality of circumferentially continuous grooves 22, a pair of narrow circumferential decoupling grooves 24, a pair of radially recessed ribs 21, and a plurality of tread ribs 25,25A. The tread 20 has a radially outer tread surface 30 having a curvature defined by an internal radius of curvature Ri and an external radius of curvature Re, Re extending laterally over a majority of a shoulder rib 25A to the narrow decoupling groove 24 on at least one-half of the tread 20, preferably both tread halves. The shoulder rib 25A has a thickness (t) at the circumferential groove 22 which progressively increases to a thickness (t max) adjacent the narrow decoupling groove 24. The tread 20 exhibits a pressure distribution in the shoulder region which is complimentary to uniform wear.

Abstract: A pneumatic tire has a tread part with two wide circumferential grooves having a width GW of not less than 35 mm and not more than the ground-contacting width TW of the tread with one circumferential groove extending on each side of the tire's equator so as to divide the tread part into a pair of shoulder parts and a central part. The central part has a surface utilizing successive convex curves of a pair of inner groove walls and a central ground-contacting surface. The central ground-contacting surface is substantially in contact with a virtual tread line between outer surfaces of the shoulder parts, and the surface of the central part is asymmetrical about the tire equatorial plane CL.

Abstract: A tire (1) a mounting rim (2) therefor, and a prop ring (3) for supporting the tread (10) of the tire when running at low or zero pressure. The tire (1) has a radial ply casing (13) on which the points that are furthest apart axially are radially apart close to seats (12B) of outwardly sloping beads (12). The seats (12B) engage sloping seats (23', 23") on the rim (2), which may have at least one mounting well (22), at least one cylindrical portion (21) for receiving the elongatable and circumferentially unstretchable rubber supporting ring (3) and a rim flange (24).

Abstract: A racing tire for oval race courses, wherein a profile of an outer region of a tread portion which is positioned to be further axially outward toward an outer side of a race course than a center line of the tire and a profile of an inner region of the tread portion which is positioned to be further axially inward toward an inner side of the race course than the same center line are asymmetrical, an outer diameter and thickness of the outer region of the tread portion being larger than an outer diameter and thickness of the inner region of the tread portion, a difference between the outer diameters of portions of the tire spaced from the center line of the tire in the opposite widthwise directions from the center line by a distance corresponding to 45% of a maximum width of the tire being set to 0.5-5.0% of the outer diameter of a portion of the tire on the center line.