Abstract: A pneumatic tire having a non-symmetric pattern in which a land ratio Lo of an outer tread surface portion To facing towards the outside of a vehicle from a tire equator C is set to be larger than a Land ratio Li of an inner tread surface pattern Ti facing towards the inside of the vehicle from the tire equator C; and concave grooves 9 extending substantially in a circumferential direction of the tire, formed in an outer tire side region Yo that is located between a grounding end Eo of the outer tread surface portion To and the maximum width position M of the tire facing towards the outside of the vehicle.

Abstract: A tire tread for a pneumatic tire has a center rib and a series of steeply slanted grooves in each side region of the tread, the circumferentially adjacent grooves form blocks extending through the tread side regions. The center rib has a serrated configuration along each lateral side and a supporting chamfer extending from each serration point. Adjacent to each rib chamfer is a chamfer extending from the axially innermost point of the rib at the junction of two adjacent steeply slanted grooves. The rib is provided with high density siping. The tread blocks are siped wherein the siping density decreases from the tread center to the tread shoulders.

Abstract: A pneumatic tire has an aggressive tread pattern for use on both on-road and off-road vehicles having at least a pair of intermediate ribs and a pair of shoulder ribs providing the ground engaging tread lugs. A plurality of circumferentially extending lug groups are formed on and extend outwardly from and along the sidewalls of the tire. Each lug group preferably includes three separate lugs, each lug having a substantially flat outer surface lying in a different plane than the outer surfaces of the other two lugs. Two of the lugs are radially aligned with each other along the sidewall of the tire with the third lug lying intermediate spaced pairs of these aligned lugs. The lugs are formed with sharp corners offset from each other which extend outwardly from the sidewall to different levels.

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 having a carcass reinforcement, a crown reinforcement and a tread joined to two beads by means of two sidewalls, the axially outer edges of the single mix of the tread being folded over on to the radially outer edges of the rubber mixes of the sidewalls, and the circular junction J between the sole rubber mix of the tread and the rubber mix of the sidewall being positioned such that its radius RC on the axially outer wall of the tire lies firstly between 0.9 RS+0.1 RB and 0.8 RS+0.2 RB and secondly between RSS and 0.9 RSS+0.1 RB, RS being the equatorial crown radius of the tread, RSS the equatorial radius of the center line of the carcass reinforcement and RB the radius of the bead seat.

Abstract: A rubber article, such as a tire, composed of at least two rubber mixes with different composition and properties, the said two mixes having a lap joint characterized in that at least one edge of at least one of the two mixes has an end with an oscillatory trace-line.

Abstract: A tyre for a vehicle wheel includes a carcass structure, a belt structure associated coaxially with the carcass structure, and a tread band extending coaxially around the belt structure. The tread band includes a relief pattern including at least one row of blocks separated by transverse grooves intersecting two circumferential grooves. Each block of the at least one row is essentially delimited by two longitudinal sides in a circumferential direction of the tyre and two transverse sides with respect to a predetermined rolling direction of the tyre. Each block of the at least one row is formed by two axially-adjacent block portions. The transverse sides of each block portion include at least two successive curvilinear portions shaped differently from each other. The transverse grooves include two branches, each branch including a widened cross-section of substantially-curvilinear shape disposed in an area substantially equidistant from ends of a respective branch.

Abstract: A pneumatic tire which comprises a tread portion with a pair of tread edges, and a tire shoulder extending radially inwardly from one of the tread edges, provided with a curved surface comprising a convex curve, wherein, on a cylindrical surface centered on the tire axis and intersecting the curved surface, the convex curve swells axially outwards and has a curvature, and the curvature gradually diminishes towards the radially inside from the tread edge. It is possible that the tread portion is provided along the tread edges with a circumferentially extending rib and/or a circumferential row of blocks. In case of circumferential rib, the rib is provided with the curved surface comprising a plurality of the convex curves and a plurality of convex curves alternating therewith so that the curved surface is waved in the tire circumferential direction. In case of blocks in a circumferential row, it is preferable that each block is provided with the curved surface comprising at last one convex curve.

Abstract: This invention relates to a pneumatic rubber tire having a rubber sidewall composition of a lug and groove configuration which is designed to be ground contacting. Such sidewall configuration is of a rubber composition comprised of a blend of natural rubber and cis 1,4-polybutadiene rubber which contains specified carbon black reinforcement and silica together with a coupling agent. The tire tread rubber composition differs from the rubber composition of said sidewall lug and groove configuration by being exclusive of silica and coupling agent and carbon black reinforcement exclusive of said specified carbon black.

Abstract: The present invention provides a pneumatic tire having a buttress in which ozone cracking resistance can be controlled over a long period and coloring and peeling do not occur, without compounding a large amount of an antioxidant. More specifically, the present invention relates to a pneumatic tire comprising a thin film layer of a width of 20 to 100 mm and a thickness of 0.5 to 5 mm formed on the buttress of the tire; wherein the thin film layer comprises a rubber composition containing 100 parts by weight of diene rubber and 0.5 to 10 parts by weight of a compound, which is in a solid state at a temperature of 40° C. or lower and is obtained by adsorbing N-(1-methylheptyl)-N′-phenyl-p-phenylenediamine to silica.

Abstract: A truck steer tire 10 has a wide decoupling groove 24 that extends inwardly from the tread in a circumferentially continuous fashion. The decoupling groove 24 extends between the tread surface 26 and the belt reinforcing structure 15. The decoupling groove 24 has a width in the range of 4 to 7 mm and a groove bottom having a full radius of curvature RG, RG being at least 2.5 mm. The decoupling groove 24 has a point C, C being centered on the bottom of the full radius of curvature RG, a line K drawn through the center C and the axially outermost end of the belt layers measures at least 10 mm and each axially outer end of the remaining belt layers is spaced greater than 10 mm from the center C.

Abstract: A pneumatic tire which includes a carcass having a carcass main extending from a bead core in one of the bead portions to a bead core in the other bead portion, and a pair of carcass turnups extending axially outside the carcass main; a tread rubber disposed in the tread portion; a sidewall rubber disposed in each of the sidewall portions; and a wing rubber interposed between the tread rubber and sidewall rubber. Each of the carcass turnups extends from axially outside of the bead core to a point in the sidewall portion. While extending from axially outside of the bead core to the point in the sidewall portion, the carcass turnup approaches the carcass main and adjoins the carcass main from a first radial height to a second radial height and then separates from the carcass main from said second radial height so as to form a separating part.

Abstract: A pneumatic tire which comprises a tread portion with a pair of tread edges, and a tire shoulder extending radially inwardly from one of the tread edges, provided with a curved surface comprising a convex curve, wherein, on a cylindrical surface centered on the tire axis and intersecting the curved surface, the convex curve swells axially outwards and has a curvature, and the curvature gradually diminishes towards the radially inside from the tread edge. It is possible that the tread portion is provided along the tread edges with a circumferentially extending rib and/or a circumferential row of blocks. In case of circumferential rib, the rib is provided with the curved surface comprising a plurality of the convex curves and a plurality of convex curves alternating therewith so that the curved surface is waved in the tire circumferential direction. In case of blocks in a circumferential row, it is preferable that each block is provided with the curved surface comprising at last one convex curve.

Abstract: Runflat tire construction is optimized for tire ride comfort by reducing tire wall gauges in the tread-shoulder-to-upper-sidewall transition region and compensating with supporting sidewalls that constantly increase in thickness (gauge) from the transition region to a bead/flange area where a chafer extends above a wheel rim flange. Thus the bead and lower sidewall area are reinforced to a maximum and the shoulder area gets only the minimum stiffness necessary to achieve the required runflat performance. Within the context of wall gauges that constantly increase from the transition region to the bead/flange area, a mid-sidewall gauge ratio MSGR, being equal to a mid-sidewall gauge G2 divided by a shoulder gauge G1, is approximately within the range of 1.1 to 1.4, preferably approximately equal to 1.3; and a bead/flange gauge ratio BFGR, being equal to a bead/flange gauge G3 divided by a shoulder gauge G1, is approximately within the range of 1.5 to 1.8, preferably approximately equal to 1.7.

Abstract: In an uneven wear-resisting heavy duty pneumatic tire tread including main grooves; land areas separated by grooves; and a stepped zone, within a land portion, located radially inside the tread contour line and bounded by narrow grooves, having a first lowered radial depth forming a wear-sacrificing portion, the improvement comprises at least a radially-directed circumferential portion of one of two radially outermost circumferentially-extending ground contact areas of the land portion, laterally terminating into one of the stepped zone grooves, with a circumferentially relieved first portion, the maximum depth thereof having a second lowered surface depth, with respect to the tread contour line, this second lowered surface depth differing from the first lowered surface depth, the relieved portion taking the shape of a surface of revolution, with the laterally directed surface thereof being one of a straight, curved, undulating, stepped, and scalloped line.

Abstract: A truck steer tire 10 has a side groove 24, 240 that extends laterally inwardly from the treadwall 29 in a circumferentially continuous fashion. The side groove 24, 240 lies between the tread surface 26 and the belt reinforcing structure 15. The side groove 24, 240 has a minimum groove (w) of 5 mm or greater and a groove depth to width ratio of 1.0 to 2.4. The groove 24, 240 preferably has a groove base having a radiused profile R, the radially inner portion of R being at least equal to one-half the minimum groove width (w).

Abstract: Tyre for a vehicle wheel, comprising at least one first component comprising an elastomeric material which is crosslinked in substantial absence of sulphur, and at least one second component comprising an elastomeric material which is crosslinked with sulphur, said first component being in contact with said second component, in which: said elastomeric material which is crosslinked in substantial absence of sulphur, forming part of said first component, comprises an elastomeric polymer containing carboxylic groups which is crosslinked by reaction with an epoxidized liquid organic compound containing epoxide groups located internally along the molecule; said elastomeric material which is crosslinked with sulphur, forming part of said second component, comprises at least one elastomeric polymer functionalized with at least one group chosen from epoxide and carboxyl.

Abstract: A heavy load pneumatic radial tire has the circular fine groove 5 running in the tire circumferential direction at least at one side of the shoulder portion 4 running on both sides of the tread surface 11 of the tread portion 1. The said fine groove 5 has a narrowed area with the central axis 5C of the sectional view of the groove sloping inward in the tire diameter direction from the aperture 51 to the internal part in the tire width direction and an expanded area following thereafter whose groove width expands with a curvature, and the external wall 52 of the said narrowed area slopes outward in the tire diameter direction than the central axis 5C of the said sectional view of the groove and the internal wall 53 of the said fine groove 5 is provided with the convex part 57.

Abstract: A radial ply, passenger vehicle tire has a tread with a substantially flat tread profile, a belt structure, and a carcass comprising two sidewalls, two beads and one or more plies. The one or more plies have a loaded shoulder ply radius that is smaller than the tire's unloaded shoulder ply radius. This design eliminates tread-lift and eliminates the need for decoupling grooves in the shoulder regions of the tread.

Abstract: The present invention relates to a tire with a colored sidewall joined with a plurality of colored grooves in its tread. In particular, the present invention relates to a tire of a black-colored rubber composition having a non-black colored sidewall portion which is integral with a plurality of non-black colored grooves of a tread of lug and groove configuration. For said tread, at least a portion of the visible surface of a plurality of tread grooves, exclusive of the outer surface portion of said carbon black reinforced rubber lugs intended to be ground-contacting, is of a non-black colored, synthetic amorphous silica reinforced rubber composition exclusive of carbon black. For said colored sidewall and plurality of connecting tread groove combination, said tread groove and sidewall may be of the same or different non-black color(s).

Abstract: A radial ply runflat tire (50) having a tread (52), a carcass (60) with two sidewalls (77,78), one or more radial plies (70,72), two annular beads (36a′,36b′), and a belt structure (56) located radially between the tread and the radial ply structure (58). The tread has laterally disposed tread ribs (64a,64b) whose contours are defined by circular curves intersecting nontangentially with the circular curve that defines the contour of the central portion of the tread. Each sidewall portion (77,78) has a rib (63a,63b) that is out of contact with the road during normal inflation operation and that engages the road during runflat operation. The tread ribs (64a,64b) are separated from the respective sidewall ribs (63a,63b) by decoupling grooves (65a,65b) which overlie the point of nontangential intersection of the circular curves that define the respective contours of the sidewall ribs and the laterally disposed tread ribs.

Abstract: An off-road tire has sidewall tread element extensions with steps that provide gripping action and support around the sidewall, and enable the tire to climb the sides of rocks and ruts. The steps are located at different distances from the tire rotational axis and from the tire tread centerline.

Abstract: An on/off-road tread (40) for passenger or light truck tire (10) has an off-road tread (40) including a central on road tread (100). The tread (40) extends from at or above a radial location of the maximum section width SW of the tire (10) but less than a radial location of 65% of the section height SH of the tire (10).

Abstract: An antistatic tire having a tread made from a first mix (MP1) and having two annular shoulders and a peripheral rolling surface, two opposite annular portions of the rolling surface being defined by outer annular surfaces of the shoulders. Each shoulder is made from a second mix (MPC), which is electrically conducting, and which, under low strain, has substantially the same rigidity as the first mix (MP1), and, under high strain, has a greater rigidity than the first mix (MP1). In a second embodiment, an electrically conducting element is inserted inside the tread. The conducting element and the shoulders both being made of an electrically conducting third mix, which, under low strain and in the cured state, has the same mechanical characteristics as the first mix in the cured state, and, under high strain, has the same mechanical characteristics as the second mix in the cured state.

Abstract: A pneumatic radial tire having a tread formed from a rubber strip-stacked body by stacking rubber strip layers composed of a rubber strip wound spirally while continuously joining side surfaces thereof to each other in a tire circumferential direction on the outside of a carcass layer via a belt layer, in which boundary surfaces of the rubber strip of the rubber strip-stacked body forming at least an outermost layers of both shoulder portions of the tread are leaned respectively toward the outside of a tire diameter direction relative to a tire outside direction in a tire width direction.

Abstract: A center rib and a second rib are formed at a tread surface of a pneumatic tire along an outer contour line L1 of a radius R1 whose center is at a tire inner side. A shoulder rib is formed at the tread surface along an outer contour line L2 of a radius R2 whose center is at a tire inner side. A step between the outer contour line L1 and a ground contact surface of the shoulder rib decreases toward a tire transverse direction outer end portion. Accordingly, when a heavy load is applied to the pneumatic tire, due to the step between, on the one hand, the shoulder rib, and on the other hand, the center rib and the second rib, uneven wear at the second rib can be suppressed. When a light load is applied, because the step decreases toward the tire transverse direction outer end portion, uneven wear of the shoulder rib can be suppressed. The pneumatic tire exhibits excellent uneven wear resistance at all land portions formed on the pneumatic tire.

Abstract: The present invention provides a tire with a sacrificial rib to protect the main ribs of the tire's tread by delaying the onset of irregular wear and the growth thereof. The improved tire tread comprises a plurality of main ribs formed by grooves extending generally circumferentially around an outer surface of the tire to form a main tread width for contacting the supporting surface. A sacrificial rib is provided for contacting the supporting surface at each lateral side of the main ribs. The sacrificial rib is separated from the main ribs by a narrow shoulder groove having a groove width not greater than about 1.5 millimeter. The sacrificial rib has a surface width in the range of about 2.5 percent to about 12 percent of said tread width. The sacrificial rib has a recess defined by a radial offset from a transverse or lateral profile of the main ribs. The offset has a value in the range of about 0.50 millimeter to about 2.0 millimeters when the tire is new.

Abstract: An assembly for manufacturing vehicle tires with light-reflective members has one or more plug inserts positionable inside a tire mold before vulcanization of the tire. The plug inserts each have a cutout in the back thereof corresponding to the portion of the tread design where reflective members are to be positioned. An elongated reflective member is placed in each of the plug inserts. When a vehicle tire is placed in the tire mold and treated under pressure, the tire expands conforming to the tire mold, while fusing the light reflective member into the tire body.

Abstract: A crack suppressing rubber, which has elongation-at-break which is superior to elongation-at-break of a cap rubber, is disposed so as to reinforce a vicinity of a groove bottom of a circumferential direction narrow groove provided in the vicinity of a shoulder of a tire tread. Due to this, generation of cracks from the vicinity of the groove bottom, at a time when land portions at an outer side of the circumferential direction narrow groove are greatly deformed due to a large lateral force or due to recesses and projections of a road surface or the like, and growth of generated cracks are suppressed. As a result, breaking of land portions at outermost sides in a widthwise direction of a tire, and separation of the tread can be effectively suppressed.

Abstract: A tire for a heavy vehicle having beads, sidewalls and a crown, the crown having a reinforcement armature formed of at least two working plies, is provided with a protuberance for deflecting sprays. To deflect the flow of water ejected laterally by this tire during travel on water-covered ground, without adversely affecting the thermal level of said tire, provision is made to arrange on at least one of the sidewalls a protuberance which is limited by an upper wall radially to the outside and a lower, wall radially to the inside, the intersection of said walls being along a line joining points C which are located axially farthest to the outside of said protuberance, the angle &agr; between the axial direction and a straight line tangent both to the edge of the tread and to the protuberance being less than 45°. Furthermore, the upper profile of the protuberance intersects the sidewall profile at a point K located within the extension of the average profile of the radially outermost crown ply.

Abstract: A pneumatic tire for motor vehicles has a running surface profile designed in the direction of rotation, with two shoulder regions (S1, S2) each being a constituent of a row of shoulder blocks, and with a middle region (C) separated from them by circumferential grooves (2) running in the circumferential direction; this middle region encompasses the width of the circumferential grooves (2) and covers a minimum width of 60% of the width of the running surface (B), is free from circumferential grooves running in the circumferential direction and is equipped with a number of V-shaped running rills (1), which open into the circumferential grooves (2) and whose V-peaks rest at least essentially on the equator line (M-M).

Abstract: A high-performance tire (1, 51) for a motor vehicle is provided with a tread (2, 52) comprising two deep circumferential grooves (3, 6, 53, 56) which separate a central region (7, 57) from two lateral shoulder regions (8, 9, 58, 59) provided with shoulder blocks (20, 120, 64, 164); in the tread (2, 52) the sum of the widths of the shoulder regions (8, 9, 58, 59) is equal to or less than 60% of its overall width L, the width of each shoulder region (8, 9, 58, 59) is not less than 20% of the overall width L, in that each of said circumferential grooves (3, 6, 53, 56) is adjacent, on the side further from said central region (7, 57), to a continuous track (22, 122, 66, 166) from which are branched transverse grooves (21, 121, 65, 165) which delimit the shoulder blocks (20, 120, 64, 164).

Abstract: The subject of the present invention is the use of cohesive, low-hysteresis compositions comprising small amounts of reinforcing fillers to produce profiled filing members arranged in the zones of the shoulder and the crown of tires in order to improve the life thereof.

Abstract: This invention relates to a novel configuration of the grooves which traverse the surface of tires. This invention provides a tapered groove configuration which tends to reduce loss of traction due to accumulation of debris on the surface of the tire. A tire with the tapered groove configuration of this invention has grooves in which the width of the upper portion of the groove is always wider that the width of the lower portion of the groove.

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 pneumatic tire comprises a tread rubber disposed radially outside a tread reinforcing belt, the tread rubber includes a radially outmost cap tread rubber and a radially inner base tread rubber, wherein the base tread rubber includes a central base tread rubber centered on the tire equator and a side base tread rubber disposed on each side of the central base tread rubber, and the tread rubber having one of the following hardness distributions (a) and (b): (a) the side base tread rubber is hardest in the tread rubber, and the cap tread rubber has a hardness of from 53 to 63 degrees, the central base tread rubber has a hardness of from 45 to 60 degrees, and the side base tread rubber has a hardness of from 65 to 75 degrees; (b) the side base tread rubber is softest in the tread rubber, and the cap tread rubber has a hardness of 60 to 80 degrees, the central base tread rubber has a hardness of from 65 to 75 degrees, and the side base tread rubber has a hardness of from 45 to 60 degrees.

Abstract: A passenger tire having a tread, a casing with two sidewalls, one or more radial plies extending from and wrapped about two annular beads and a belt reinforcement structure located radially between the tread and the piles. The tread has a central rib with a first contour-defining curve extending outwards from the mid centerline of the tire towards the sidewalls and a pair of side ribs each having a second contour-defining curve disposed between the central rib and the sidewalls. The first and second contour-defining curves each have first and second radii disposed such that the meeting point of first and second adjacent contour-defining curves cannot contain a single line that is mutually tangential to the first and second adjacent contour-defining curves.

Abstract: In a motor vehicle tire (1) for driving conditions as they occur during the winter months, parallel incisions are provided with staggers that are placed such that a smaller distance between adjacent incisions arises in the central region of the pad than in the marginal region of the pad.

Abstract: The invention relates to a vehicle tire comprising a tread in road contact, which comprises a surface that gets in road contact during free rotation of the tire and two shoulder areas on each side of the central plane, and located in order, on each side of the tread and symmetrically to the central plane, two tread wing areas extending the shoulder areas and two sidewalls. The tire of the invention is characterized by at least part of the tire being made of a material that varies in color with the temperature.

Abstract: A pneumatic tire comprises: a carcass comprising a carcass main extending from a bead core in one of bead portions to a bead core in the other bead portion, and a pair of carcass turnups axially outside the carcass main; a tread rubber disposed in the tread portion; a sidewall rubber disposed in each of the sidewall portions; and a wing rubber interposed between the tread rubber and sidewall rubber. Each of the carcass turnups extends from the axially outside of the bead core to a point in the sidewall portion. While extending from the axially outside of the bead core to the point in the sidewall portion, the carcass turnup approaches the carcass main and adjoins the carcass main from a first radial height to a second radial height and then separates from the carcass main from said second radial height so as to form a separating part.

Abstract: Vehicle tire comprises a rubber tread profile, and at least one rubber tread area running in a circumferential direction. Primary profile structures are arranged in the rubber tread area, the primary profile structures being aligned at an angle deviating up to 40° from the circumferential direction. Secondary profile structures are provided in a crossing arrangement in relation to the primary profile structures, wherein the primary and the secondary profile structures form similar pitches of differing circumferential lengths in the circumferential direction. At least two types of base pitches are provided, a first of the at least two types of base pitches differing from a second of the at least two types of base pitches by their various circumferential lengths. The base pitches of one type are identically embodied, whereas the base pitches are embodied differently relative to the progression of their profile structures.

Abstract: In a pneumatic tire including sipes extending in zigzag provided on tread surfaces, both wall surfaces of each sipe, which face to each other, are inclined with respect to a diameter direction of the tire, constituted of triangular wall surfaces, each having two sides expanding toward a sipe bottom with a bending point of a zigzag of the sipe as an apex and of inverse triangular wall surfaces, each having two sides narrowed toward the sipe bottom with one side of the zigzag of the sipe as a base, and a pair of the triangular wall surfaces adjacent to each other and a pair of the inverse triangular wall surfaces adjacent to each other are alternately arranged. Thus, provided is a pneumatic tire capable of improving ice performance without lowering driving stability on a dry road surface, and of suppressing occurrence of uneven wear.

Abstract: A pneumatic tire including a tread portion provided along each tread edge with a circumferential row of shoulder blocks, and each of the shoulder blocks has an axially outer side face which is convexly curved in a plane parallel to the tread surface, whereby the wandering performance of the tire can be improved without causing uneven wear, rubber tear-off, deterioration in running performance and the like.

Abstract: Disclosed is a pneumatic tire effectively controlling uneven wear occurring in the vicinity of a main groove even if a groove width of the main groove is widened due to change in tread radius during inflation. In the pneumatic tire, with regard to the main groove having the groove width widened during inflation among a plurality of main grooves provided on a tread surface, a groove wall near a shoulder is inclined outward in a tire width direction toward a groove bottom, and a thin rib protruding from the groove bottom along the groove wall near the shoulder is provided.

Abstract: A pneumatic tire for vehicle wheels includes a radial carcass, a tread band, sidewalls and beads, and a belt structure. The tread band is provided with grooves on its surface for coming into contact with the ground and situated on a radial outer surface of the carcass. The sidewalls and beads anchor the tire on a wheel rim. The belt structure is disposed between the tread band and the carcass. Additionally, a fiber-reinforced elastomeric intermediate layer is placed between the belt structure and the tread band. Methods for manufacturing the pneumatic tire are also disclosed.

Abstract: A pneumatic tire which comprises a tread portion with a pair of tread edges, and a tire shoulder extending radially inwardly from one of the tread edges, provided with a curved surface comprising a convex curve, wherein, on a cylindrical surface centered on the tire axis and intersecting the curved surface, the convex curve swells axially outwards and has a curvature, and the curvature gradually diminishes towards the radially inside from the tread edge. It is possible that the tread portion is provided along the tread edges with a circumferentially extending rib and/or a circumferential row of blocks. In case of circumferential rib, the rib is provided with the curved surface comprising a plurality of the convex curves and a plurality of convex curves alternating therewith so that the curved surface is waved in the tire circumferential direction. In case of blocks in a circumferential row, it is preferable that each block is provided with the curved surface comprising at last one convex curve.

Abstract: This invention relates to a pneumatic rubber tire having a rubber sidewall composition of a lug and groove configuration which is designed to be ground contacting. Such sidewall configuration is of a rubber composition comprised of a blend of natural rubber and cis 1,4-polybutadiene rubber which contains carbon black and silica together with a coupling agent.

Abstract: A tire having a tread comprises a central raised rib having first and second lateral edges and extends about the tire and in generally circumferential manner. The central raised rib is substantially disposed on an equatorial plane of the tire. A plurality of transverse raised ribs has first and second radial edges and is axially disposed along a tread section width. Each of said transverse raised ribs is substantially V-shaped and connected to central raised rib.

Abstract: A tire for a wheel of a vehicle comprises a toroidal carcass provided with axially opposite sidewalls and beads for anchoring the tire to a rim of the wheel, a tread band located crownwise on the carcass, comprising a surface with a plurality of hollows and grooves defining a raised tread pattern, and a belt structure interposed between the carcass and the tread band, axially extending between the sidewalls. The tread band comprises at least first and second circumferential axially-contiguous portions arranged to contact a road surface. The first portion is formed of a first composition comprising a reinforcing filler having at least 40%-by-weight carbon black and at least some white filler, the second portion is formed of a second composition comprising a reinforcing filler having at least 20%-by-weight white filler, and the first composition is different from the second composition.

Abstract: Tread profile of a snow tire for a vehicle in which at least two vehicle wheels are rotatably mountable outside of a longitudinal vehicle axis. The tread profile includes a plurality of profile block rows aligned in a circumferential direction and distributed in an axial direction from a first tire shoulder adapted to be positioned toward an outside of the vehicle in an operational state of the tire on the vehicle to a second tire shoulder adapted to be positioned toward an inside of the vehicle in an operational state of the tire on the vehicle.