Abstract: A pneumatic tire includes two cross belts having codes forming 5 to 30 degrees to a tire circumferential direction; a circumferential reinforcing layer having a width smaller than the cross belts, and having codes forming 0 to 5 degrees to the tire circumferential direction; and a carcass located inside, in a tire diameter direction, relative to a cross belt being inside among the cross belts. At 100% internal inflation pressure, a distance X1 between an equatorial plane and an outer edge of the circumferential reinforcing layer is 60% to 75% of a distance W between the equatorial plane and an outermost section of the carcass, and at 5% internal inflation pressure, a distance Y between the equatorial plane and a separation section of the carcass and a belt outwardly adjoining the carcass is 95% to 105% of a distance X2 between the equatorial plane and the outer edge.

Abstract: A pneumatic tire having a tread portion, a pair of sidewall portions, a pair of bead portions each with a bead core therein, wherein in a tire meridian section including a tire axis under a standard state that the tire is mounted on a standard rim and inflated to a standard pressure but loaded with no tire load, the tread portion has a tread width TW (mm) being from 80 to 90% of a nominal tire width YW, a profile from a shoulder region of the tread portion to the sidewall portion includes a shoulder profile for defining the shoulder portion, a sidewall profile for defining at least a part of the sidewall portion, and a buttress profile smoothly connecting between the shoulder profile and the sidewall profile.

Abstract: A reinforcing rubber layer having a falcated cross-section disposed on an inner side in a tire width direction of the carcass layer in a side wall portion. An angle ?, with respect to the total tire width SW and a tire cross-section height SH, satisfies a relationship (SH/SW×6+3)°???(SH/SW×6+8)°. Additionally, a height H1 of a bead filler is from 15 to 35% of the tire cross-section height SH and a height H2 of a maximum thickness position of the reinforcing rubber layer is from 35 to 55% of the tire cross-section height SH.

Abstract: A cushioning rubber composition contains 5 to 20 parts by mass of first carbon black having an iodine adsorption number of 50 to 70 mg/g and a dibutyl phthalate oil absorption of 130 to 150 ml/100 g and 15 to 30 parts by mass of second carbon black having an iodine adsorption number of 110 to 130 mg/g and a dibutyl phthalate oil absorption of 105 to 120 ml/100 g as well as sulfur and a vulcanization accelerator with respect to 100 parts by mass of a rubber component, while the mass ratio of sulfur to the vulcanization accelerator is 1.0 to 2.3.

Abstract: A run-flat tire capable of reducing weight and enhancing its uniformity. The run-flat tire 1 provides a toroidal carcass 6 extending from a tread portion 2 to the bead core of each bead portion 4 through each of sidewall portions 3 and a pair of side reinforcing rubbers 9 arranged inside the carcass 6 and extending along the sidewall portions 3 in the tire radial direction inwardly and outwardly. In the outer surface of the tread portion 2, pattern elements are arranged, thereby forming a pitch pattern. Each of the side reinforcing rubber 9 provides with recesses 11 circumferentially spaced on the inner surface of side reinforcing rubber facing the tire cavity. The total number (n) of recesses 11 on each of the side reinforcing rubber 9 is 0.70 to 1.30 times the total number of pattern elements.

Abstract: A tire pair 2 for a motorcycle includes a front tire 6 and a rear tire 8. A difference (F15?R15) between a camber thrust index F15 of the front tire 6 and a camber thrust index R15 of the rear tire 8 at a camber angle of 15° is equal to or greater than ?0.038 and is equal to or smaller than 0.038. A difference (F30?R30) between a camber thrust index F30 of the front tire 6 and a camber thrust index R30 of the rear tire 8 at a camber angle of 30° is equal to or greater than 0.038 and is equal to or smaller than 0.114. The camber thrust index F30 at the camber angle of 30° is equal to or greater than 0.570. A difference (F45?R45) between a camber thrust index F45 of the front tire 6 and a camber thrust index R45 of the rear tire 8 at a camber angle of 45° is equal to or greater than 0.076 and is equal to or smaller than 0.228.

Abstract: An assembly adjusts functional characteristics of the assembly. The assembly includes a wheel for a vehicle, a pneumatic tire mounted on the wheel, a first electromagnetic structure attached to the pneumatic tire, and a second electromagnetic structure attached to the wheel. The assembly has a first condition characterized by the first and second electromagnetic structures being not energized and a second condition characterized by the first and second electromagnetic structures being energized. The first condition is characterized by a first footprint of the pneumatic tire with a shape different than a shape of a second footprint of the pneumatic tire in the second condition.

Abstract: The present invention generally relates to light weight tire devices comprising a plurality of layers of steel belts. The layers are each a predetermined fraction of the footprint width, and the width of each layer can vary from one layer to another. Some embodiments also include a pair of wedge strips disposed between two reinforcing layers. Furthermore, some embodiments can include a split belt, wherein the gap between the split belts is substantially occupied by a gum strip. Additionally, the belt ply cords can be angled according to one or more patterns.

Abstract: A pneumatic tyre of the semi-hollow type includes a casing having an uninflated inner volume and including an inner wall provided with a retaining bead and a convex outer wall forming the tread of the tyre, the inner wall and the outer wall of the tyre being connected by two annular borders. The inner wall of the tyre is concave so as to surmount a convex outer wall of the peripheral seat of a rim of a wheel, this outer wall being provided with a peripheral slot adapted to accommodate the retaining bead of the tyre.

Abstract: A tread surface includes a center arc, a shoulder-side arc, and a shoulder arc, and is formed such that a value given by F1=L1/(TDW×0.5) falls in the range of 0.64?F1?0.7, a value given by F2=TR1/OD falls in the range of 1.2?F2?2.0, a value given by F3=TR2/TR1 falls in the range of 0.1?F3?0.2, and a value given by F4=(?×TDW)/(100×SW) falls in the range of 0.35?F4?0.48, where L1 is outline range being a width from an equatorial plane to an edge of the center arc, TDW is extended tread width, TR1 is curvature radius of the center arc, TR2 is curvature radius of the shoulder-side arc, OD is tire outside diameter, SW is total width, and ? is aspect ratio.

Abstract: Various embodiments of a pneumatic tire include a tread portion, a first bead portion and a second bead portion which are axially spaced, a first sidewall portion and a second sidewall portion and a first and second carcass ply. The first carcass ply includes a main portion which extends circumferentially about the tire from the first bead portion to the second bead portion, a first turned-up portion around the first bead portion and a second turned-up portion around the second bead portion such that the first and second turned-up portions each have an end which terminates along the tread portion. The second carcass ply extends circumferentially about the tire along the first sidewall and along the second sidewall. The second carcass ply has a first end and a second end which terminates in the lower portion of the tire.

Abstract: A pneumatic tire according to the present invention enhances visibility of a mark formed on a sidewall portion, and reduces cure trouble due to an air pocket produced during molding of the mark. Two circumferential projections 9 extending in the circumferential direction of the tire are disposed on the surface 2a of a sidewall portion 2 at a prescribed distance in the radial direction of the tire. At least two radial projections 10 extending in the radial direction of the tire and connected to the two circumferential projections 9 are disposed at a prescribed distance in the circumferential direction of the tire between the two circumferential projections 9. A region defined by the circumferential projections 9 and radial projections 10 is formed in a depression surface 11 depressed from the surface 2a of the sidewall portion 2. At least one mark 8 protruding beyond the surface 2a of the sidewall portion 2 is provided on the depression surface 11.

Abstract: A pneumatic tire including a cylindrical annular structure, a rubber layer that will become a tread portion provided along a circumferential direction of the annular structure, on an outer side of the annular structure, and a carcass portion including fibers covered by rubber, provided on both sides in a direction parallel to a center axis (Y-axis) of a cylindrical structure including the annular structure and the rubber layer. In a meridian cross-sectional view of the structure, an outer side of the rubber layer and the outer side of the annular structure have the same form.

Abstract: A tire for two-wheeled motorcycles of the present invention includes a first carcass layer folded back along circumferential surfaces of bead cores, a second carcass layer folded back along circumferential surfaces of turnbacks of the first carcass layer 5, a belt layer wound spirally along a tire circumferential direction and an intermediate carcass layer provided between the first and second carcass layers 7 and in an inner circumferential side of the belt layer and extending close to a tire maximum width.

Abstract: A two-piece tire assembly 10 with a removable tread belt 12 for installing about the circumference of a tire carcass 14 is provided. The two-piece tire assembly 10 includes a tread belt 12 has a belt structure 90 having two or more belt layers 100, 110, 120, 130 each layer having one or more belts. The tread belt 12 has a radially inner surface 70 having one or more protruding circumferential ribs 72 or grooves 74 that fit into complementary grooves 18 or ribs 19 on an outer crown surface of the tire carcass 14. The tread belt 12 has a maximum axial belt width W at a radially inner surface. The carcass 14 has a maximum section width SW and ply line 20 having a maximum width P wherein W?0.95P, BW?5 0.85P and P<SW.

Abstract: An apparatus and method for transporting a payload over a surface is provided. A vehicle supports a payload with a support partially enclosed by an enclosure. Two laterally disposed ground-contacting elements are coupled to at least one of the enclosure or support. A motorized drive is coupled to the ground-contacting elements. A controller coupled to the drive governs the operation of the drive at least in response to the position of the center of gravity of the vehicle to dynamically control balancing of the vehicle.

Abstract: A pneumatic tire includes a tread portion on each side of the equatorial plane. At least two circumferential main grooves and three land portions are formed in the tread portion. In a cross section in a meridian direction of the pneumatic tire, profile lines of the land portions form arcs, and an intersection of extension lines of profile lines of adjacent land portions forms an inflection point in a circumferential main groove. Tensile strength of a reinforcing layer in the land portions is larger than that in the circumferential main groove having the inflection points.

Abstract: A pneumatic tire including a tread part contacting a road surface, at least two belt layers each formed of a plurality of parallel cords covered with rubber, and a pair of bead toes. An angle at which the line segment BQ and the line segment SW cross is 50° or smaller when, in a cross section including the axis of rotation: the ends of a shortest belt layer, which is the shortest one, in length in a tire width direction, of the belt layers are set to be points B; points on a tire surface, between which the width of the tire is the widest, are set to be points Q; a line segment connecting each point B and the corresponding one of the points Q is set to be a line segment BQ; and a line segment connecting the pair of points Q is set to be a line segment SW.

Abstract: The invention relates to a tire having a radial carcass reinforcement comprising a crown reinforcement formed of at least two working crown layers of inextensible reinforcement elements, which are crossed from one layer to the other, forming with the circumferential direction angles of between 10° and 45°, which itself is topped radially by a tread, said tread being joined to two beads by means of two sidewalls and the crown reinforcement comprising at least one layer of circumferential reinforcement elements of an axial width less than that of at least one of the working crown layers. According to the invention, the ratio of the axial width of at least one layer of circumferential reinforcement elements to the axial width of the tread is greater than 0.6, and preferably greater than 0.65, and the ratio of the axial width of the tread to the maximum axial width of the tire is strictly greater than 0.89.

Abstract: In a pneumatic tire, 48%?HB/HA?52%, 98%?HC/HA?100%, 108%?WB/WA?115%, and 55%?WC/WA?75% are satisfied, where, when a line from a position A of rim height FH in tire width direction is X-axis and a line in tire radial direction via center crown CL is Y-axis, WA is distance of a half of tire base width, WB is distance from the Y-axis to a maximum width position P of a carcass layer, WC is distance from the Y-axis to an inflection point Q of the carcass layer, HA is distance from the X-axis to a peak R of the carcass layer on the center crown CL, HB is distance from the X-axis to the maximum width position P, and HC is distance from the X-axis to the inflection point Q.

Abstract: A run flat tire in which the maximum tire width position when the tire is in an inflated state, the inclination angle formed by the line S? tangent to the tire outer wall in the tire shoulder region, the curving form of the tread surface, the relationship between the thickness Ga of the outer side rubber taken on a line X normal to the rim line and centered on the carcass layer 5 and the maximum thickness Gb of the outer side rubber in an upper region of the bead portion 2, the relationship of the thickness Gc of the inner side rubber taken on a line X normal to the rim line and centered on the carcass layer 5 and the thickness Ga of the outer side rubber are each stipulated.

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 pneumatic tire has a rough surface portion which is provided on an outer surface of a side wall portion. In the rough surface portion, a maximum height Rz is equal to or more than 4 ?m and a skewness Rsk satisfies Rsk>0.

Abstract: A heavy-duty tire having a tread portion improved in the shoulder wear is disclosed. Under the maximum load condition[W100], the tread portion has a ground contacting face G[W100] having circumferential lengths L97[W100] and L70[W100] at specific axial positions. Under the 70% load condition[W70], the tread portion has a ground contacting face G[W70] having lengths L97[W70] and L70[W70] at specific axial positions. The lengths L70[W100], L97[W100], L70[W70] and L97[W70] satisfy specific conditions: 0.95<L70[W100]/L97[W100]<1.05; and 1.03<L70[W70]/L97[W70]<1.20.

Abstract: A pneumatic tire includes: an outer diameter and a total width being set to fall within ranges from 0 mm to 6 mm with respect to lower limits of standard dimensions in a state where the pneumatic tire is fitted to a standard rim and a normal internal pressure is applied; a tread ground contact width at 60% load being set to fall within a range from 60% to 75% of the total width; and a plurality of recesses being provided over a tire circumferential direction and a tire radial direction in a region defined on a tire outer surface excluding an area extending from an inner side end portion of the pneumatic tire to a position within 35% height of a tire cross-section height.

Abstract: A pneumatic radial tire having a structure where the lapel edge of the carcass is tucked under a belt layer and exhibiting high durability and steering stability can be easily produced using a carcass material of an existing size without preparing an ultra-wide carcass material. Two layers of carcasses (A, B) are extended from a tread portion (1) to a bead portion (3) via right and left sidewall portions (2), and the opposite ends thereof are turned down from the inside of the tire to the outside around right and left bead cores (4, 4). A belt layer (6) is arranged on the outer circumferential side of the carcasses (A, B) and the overall width of the carcasses (A, B) in the tire width direction is essentially equal and the carcasses (A, B) are offset in opposite directions in the tire width direction.

Abstract: A method for reducing tire microsliding includes defining a rotation point and rotating a cross section profile about it. A cross section of a radially-external reference profile of a tread band includes a first rectilinear segment near at least one circumferential rib of a first shoulder portion. The first rectilinear segment extends axially outward beyond a corresponding shoulder edge point. A cross section profile of the at least one circumferential rib of the first shoulder portion includes a second rectilinear segment. The rotation point is on the first rectilinear segment, either the corresponding shoulder edge point itself or axially outward of it. The cross section profile of the first rectilinear segment is rotated to define the cross section profile of the second rectilinear segment, so that an axially-inner end of the second rectilinear segment is closer to the carcass structure than an axially-inner end of the first rectilinear segment.

Abstract: The present invention is intended to provide a studless tire capable of enhancing straight-running stability with a low tread rigidity. In a section of a studless tire 10 passing a central axis line under a condition where the tire is mounted on a predetermined rim 11 and a predetermined inner pressure is charged therein, assuming that a distance A is measured from a position where a bladder ring is divided to a position where a maximum tire width is obtained along the tire radial direction and a distance B is measured from the position where the bladder ring is divided to a position where a tread ring is divide along the tire radial direction, a side-shape coefficient of the tire defined as a ratio A/B in a state where the tire is installed on a vehicle is between 0.52 and 0.55 in a widthwise half portion disposed at a widthwise outer side of the vehicle and between 0.45 and 0.50 in a widthwise half portion disposed at a widthwise inner side of the vehicle, or between 0.5 and 0.

Abstract: The present invention provides a pneumatic radial tire capable of effectively improving belt durability, while ensuring good resistance to wear at a tread surface.

Abstract: A pneumatic tire having a belt structure includes: a first belt layer; a second belt layer in a radially inner position with respect to the first belt layer, a third belt layer in a radially inner position with respect to the first and second belt layers, each belt layer including a plurality of elongated reinforcing elements disposed at a first, second and third belt angle respectively. The first and second belt angles have an absolute value of 15 to 40 degrees; the second angle is of opposite sign with respect to the first belt angle; and the third belt angle has an absolute value of 40 to 90 degrees and is of opposite sign with respect to the second belt angle. The belt structure also includes a zero degree belt layer placed in a radially outer position with repeat to the first belt layer including elongated reinforcing elements arranged such as to form a belt angle which is substantially zero.

Abstract: A tire with a radial carcass reinforcement comprising a crown reinforcement formed from at least two working crown layers of inextensible reinforcing elements and from at least one layer of circumferential reinforcing elements positioned radially between two working crown layers, the working crown layers adjacent to the layer of circumferential reinforcing elements being on each side of the equatorial plane and in the axial continuation of the layer of circumferential reinforcing elements coupled over an axial width, in order thereafter to be decoupled. A layer of polymer blend having a thickness greater than 1.5 mm over an axial width greater than 0.1×d is positioned axially between the axially exterior end of the layer of circumferential reinforcing elements and the axially interior end of the coupling zone of the working crown layers.

Abstract: Since a protecting layer 43 embedded with reinforcing cords 41 is disposed between a tread 35 and a belt reinforcing layer 31, both of the protecting layer 43 and the belt reinforcing layer 31 decentrally bear a large bending force generated when a pneumatic tire 11 runs on a sharp projection or a difference in level. As a result, even if reinforcing elements 33 in the belt reinforcing layer 31 are extended by large tension due to fill internal pressure, increase of strain generated in the reinforcing elements 33 can be effectively suppressed.

Abstract: A tyre for motorcycles includes a tread band in which a tread pattern is formed which includes a series of transverse grooves disposed at least laterally of the equatorial plane. The tread pattern on the whole defines a low sea/land ratio on the tread band. The series of transverse grooves includes a plurality of main recesses having an overall length at least equal to one fourth of a lateral extension of the tread band. The main recesses define with the equatorial plane, an angle less than or equal to 65°, substantially over the entire length thereof.

Abstract: A tire includes: a carcass structure including at least one carcass ply, a belt structure, a tread band radially superimposed on the belt structure; two sidewalls; the belt structure including: at least one pair of lateral reinforcing layers incorporating reinforcing elements oriented in a substantially circumferential direction; a first belt layer radially superimposed on the pair of lateral reinforcing layers, provided with reinforcing elements inclined with respect to the equatorial plane of the tire; a second belt layer radially superimposed on the first belt layer, provided with reinforcing elements inclined with respect to the equatorial plane in a direction opposite to those of the first belt layer; an external belt layer applied in a radially external position with respect to the first and the second belt layers. Preferably, the tire is a super single wide base heavy load vehicle tire. The tire is particularly useful for heavy load vehicles such as, for example, trucks, trailers, or buses.

Abstract: A pneumatic tire comprising a tread portion 1, a pair of sidewall portions 2, a pair of bead portions 3, a carcass 5 comprised of at least one carcass ply having a main body portion toroidally extending between bead cores 4 each embedded in the respective bead portion 3 and a turnup portion 5b wound around the bead core 4 from inside to outside in a widthwise direction of the tire and a side rubber 9 arranged outside of the carcass in the widthwise direction, characterized in that a thin-walled recess 10 is formed inward from a tire maximum width position W in the radial direction and outward from a radially outer end of the turnup portion of the carcass at a posture of mounting the tire on an approved rim so that a minimum size t of rubber gauge in the side rubber as measured in a normal direction drawn from the outermost carcass ply is within a range of 2.5-4.5 mm.

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: [Problem] It is an object to provide a tire for a motorcycle which realizes a low fuel consumption and is also excellent in a grip performance. [Means for Resolution] A tire (2) includes a tread (4) and a carcass (12) having a radial structure. The tread (4) includes a base layer (21) and a cap layer (22). The cap layer (22) has a center region (23) and a pair of shoulder regions (24) positioned on an outside in an axial direction with respect to the center region (23). A ratio (Wc/Wt) of a width (Wc) of the center region (23) to a width (Wt) of the tread (4) is equal to or higher than 0.15 and is equal to or lower than 0.4. A loss tangent (tan ?c) of the center region (23) is smaller than a loss tangent (tan ?s) of the shoulder region (24). A loss tangent (tan ?b) of the base layer (21) is smaller than the loss tangent (tan ?s) of the shoulder region (24). The loss tangent (tan ?b) of the base layer (21) is equal to or smaller than 0.15.

Abstract: A pneumatic tire for use on trucks, the tire comprising: a tread which includes a belt reinforcement structure, the belt structure including a pair of working belts, wherein the angle of the working belts range from about 16 degrees to about 30 degrees, wherein a low angle belt is positioned preferably between of the working belts, wherein the angle of the low angle belt is less than 5 degrees. The working belts are extensible, and preferably made of high elongation wire.

Abstract: A tire 2 has a belt 14 and a hard rubber layer 16. The belt 14 has a first ply 26, a second ply 28, a third ply 30 and a fourth ply 32. A width W3 of the third ply 30 is smaller than a width W1 of the first ply 26 and a width W2 of the second ply 28, and 75% of a width of a tread. Each of the plies 26, 28, 30, 32 has a steel cord. The first ply 26 and the second ply 28 construct a cross-ply structure. A cord of the third ply 30 is wound spirally. The third ply 30 has what is referred to as a jointless structure. The hard rubber layer 16 is positioned between the first ply 26 and the second ply 28, and outward of the third ply 30 in an axial direction. A complex elastic modulus of the hard rubber layer 16 is equal to or greater than 30 MPa.

Abstract: A belt layer of the heavy load pneumatic tire includes a first reinforcement belt, a first function belt, a second reinforcement belt, and a second function belt, and when defining, as viewed in the width direction of the tire, the length from the outer end of the first reinforcement belt to a tire equator as “Wrs”, the length from the outer end of the function belt having the shorter length in the first and second function belts to the tire equator as “Ww”, and the length from the outer end of the second reinforcement belt to the tire equator as “Wr”, the lengths are set so as to be Wr<Wrs<Ww.

Abstract: In the present invention, a vehicle inner side bead filler sheet 32IN is provided at a tire side portion which is positioned on the vehicle inner side when the tire is mounted on a vehicle, a vehicle outer side bead filler sheet 32OUT is provided at a tire side portion which is positioned on the vehicle outer side when the tire is mounted on a vehicle, the height H1 of the vehicle inner side bead filler sheet is set larger than the height H2 of the vehicle outer side bead filler sheet. As a result, the rigidity of the tire side portion on the vehicle inner side can be set relatively higher than the rigidity of the tire side portion on the vehicle outer side.

Abstract: In a pneumatic tire, 48%?HB/HA?52%, 98%?HC/HA?100%, 108%?WB/WA?115%, and 55%?WC/WA?75% are satisfied, where, when a line from a position A of rim height FH in tire width direction is X-axis and a line in tire radial direction via center crown CL is Y-axis, WA is distance of a half of tire base width, WB is distance from the Y-axis to a maximum width position P of a carcass layer, WC is distance from the Y-axis to an inflection point Q of the carcass layer, HA is distance from the X-axis to a peak R of the carcass layer on the center crown CL, HB is distance from the X-axis to the maximum width position P, and HC is distance from the X-axis to the inflection point Q.

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 pneumatic tire has a tread with a side surface on each axially outermost side thereof. The side surface is formed by a shoulder land portion at tread edge rising from a sidewall. The angle between a tangent to the side surface from the bottom thereof and a tangent to the surface of the sidewall 12 connecting to the side surface from the bottom is 130 degrees or more and less than 180 degrees. Also, the angle between the tangent to the side surface and the radial direction of the tire is 20 degrees or more and degrees or less. This design not only ensures retention of the stiffness of the tread but also prevents ground contact of any part of tire surface other than the tread during heavy-load running or high-speed cornering of the vehicle.

Abstract: A pneumatic tire according to the present invention includes a carcass layer configured with a main body and turnbacks and meets following conditions. (a) Aspect ratio equal-to or smaller-than 80% (b) Cords composing the turnbacks are arranged with 0 to 10 degree to a radial direction (c) 2×FH?CE?6×FH (d) 3×a?t?5×a within a range of 2×FH to 4×FH from an inner circumferential flange edge of a rim in a tire radial direction (e) 0.915?L2/L1?1.

Abstract: The durability is improved by using as a carcass ply cord or a belt cord of a tire a cord formed by twisting plural steel filaments having a tensile strength of not less than 2700 N/mm2, and a total elongation at break of the cord of 3.0-7.0% without sacrificing the excellent ride comfort.

Abstract: A pneumatic tire with a crown-shaped tread, a pair of bead portions, and a pair of side walls connecting the tread and the bead portions, wherein rim protectors which protrude outwardly in the tire rotating axial direction from the bead portions are provided at least either one of the pair of bead portions, and a plurality of protrusions are provided on a lateral side 3a outwardly in the tire radius direction of the rim protectors, and surface areas of the protrusions are not less than 50 mm2 and intervals of adjacent protrusions are not greater than 160 mm.

Abstract: A heavy duty tire has a tread portion 2 which is divided into five inner, intermediate and outer rib-like land portions R1, R2, R2, R3 and R3. The inner rib-like land portion R1 is virtudally divided into half regions R1a and R1a on each side of a tire equator. The intermediate rib-like land portions R2 and R3 are virtually divided into tire equator-side half regions R2c and R3c, and into ground-contact edge-side half regions R2e and R3e. In a regular ground-contact state in which a normal load is applied, when total sums of ground-contact load applied to the half regions R1a, R2c, R2e, R3c and R3e are defined as P1a, P2c, P2e, P3c and P3e, P2c/P1a is set to 0.9 to 1.05, P2e/P2c is set to 0.75 to 1.0, P3c/P2e is set to 0.9 to 1.2, and P3e/P3c is set to 0.8 to 1.1.

Abstract: Assembly comprising a vehicle wheel, with symmetry of revolution, comprising a disc and a rim, the said rim comprising a first and a second seat which seats are intended to receive and to hold a first and a second bead of the tire, each seat having a substantially frustoconical bottom locally coinciding with a cone of revolution coaxial with the rim and open towards the other seat, the said rim defining, at the level of an axial straight line passing through the farthermost points of the outer portions, a width Lj and, on the other hand, a tire for a vehicle wheel, comprising two sidewalls spaced axially apart and defining, at the level of an axial straight line passing through the farthermost points, a width Lf, in which when the said tire is mounted on the said rim and inflated close to its nominal working pressure and when the said tire is substantially unflattened, the said width Lf is greater than the said width Lj.

Abstract: A pneumatic tire with excellent run-flat performance that can improve durability of a tire and promote low fuel comsuption is provided. The pneumatic tire has a reinforcing rubber layer with a nearly crescent cross section at the inner side of a carcass layer of a side wall, wherein the reinforcing rubber layer comprises a rubber composition which comprises 100 parts by weight of a diene rubber component containing from 15 to 50 parts by weight of a butadiene rubber or a styrene-butadiene rubber, its molecular end being modified with a modifier, polymerized using an organic lithium catalyst, and from 40 to 80 parts by weight of carbon black having a nitrogen adsorption specific surface area (N2SA) of from 20 to less than 30 m2/g and a dibutyl phthalate (DBP) absorption of from 50 to 155 cm3/100 g, and loss tangent (tan ?) of the rubber composition measured at 70° C. is less than 0.07.