Abstract: A tire for running on rough terrain has a tread portion provided with crown blocks, middle blocks, and groove portions. Each of the crown blocks includes a ground contacting surface and a first wall surface located on a heel side in a tire rotational direction. The first wall surface is inclined to a toe side in the tire rotational direction as it goes inward in a tire radial direction from the ground contacting surface. Each of the groove portions has a length in the tire axial direction of 5% or more and 70% or less of a length in the tire axial direction of each of the middle blocks.

Abstract: A motorcycle pneumatic tire, in which the tread includes a central rubber and a side rubber, having a lower modulus than the central rubber, that are sequentially laminated in both tire widthwise side portions, the side rubber extending to a tire width-direction inner side further than a point at ¼ of a tread width on a tire width-direction outer side from a tire equator. A tire ground-contact surface has a tread pattern that includes plural inclined grooves and, when the tread width is equally divided in eight, a region constituting a range of ¼ to ? of the tread width on the tire width-direction outer side from the tire equator has the largest number of inclined grooves included per a single pitch of the tread pattern, and the depth of the inclined grooves is greater than the thickness of the side rubber in at least a part of the region.

Abstract: A two-wheeled vehicle tyre includes a tread portion which is provided with a row of crown blocks arranged on a tyre equator and a row of middle blocks arranged axially outwardly of the row of crown blocks. Circumferential pitch lengths of directly adjacent crown blocks are greater than circumferential pitch lengths of directly adjacent middle blocks.

Abstract: A bicycle tyre (100), comprising a carcass structure (2) and a tread band (7) applied in a radially outer position with respect to the carcass structure (2). The tread band (7) comprises a crown portion (7a) extending astride of an equatorial plane (X) of the tyre (100) and having a predetermined radius of curvature (R1) and a pair of lateral portions (7b) arranged on axially opposite sides with respect to the crown portion (7a) and each having a second radius of curvature (R2) greater than said first radius of curvature (R1).

Abstract: A tire includes medial knobs and lateral knobs in right and left zones extending around the circumference. The tire includes a central zone in between two arrays of medial knobs. The central zone may include no knobs or knobs with a height less than 50% of the height of the lateral knobs.

Abstract: A tyre 1 for a motorcycle comprises a tread portion 2 and a pair of sidewall portions 3 connected with both ends of the tread portion 2 and extending inwardly in a tyre radial direction. A connecting portion 9 of the tread portion 2 and at least one of the pair of the sidewall portions 3 is provided with a plurality of protruding portions 10 each protruding outwardly in a tyre axial direction. The plurality of the protruding portions 10 is arranged in a tyre circumferential direction with a space 11 between each other.

Abstract: A motorcycle tyre has a tread band including a central portion and two shoulder portions arranged at axially opposite sides of the central portion. The central portion includes a first plurality of grooves extended according to a substantially longitudinal direction and alternatively arranged at opposite sides of the equatorial plane of the tyre. Each groove of the first plurality of grooves has a substantially curvilinear course such as to form a concavity. The central portion further includes a sub-portion substantially free of grooves placed astride the equatorial plane of the tyre. Each of the shoulder portions includes a second plurality of grooves arranged obliquely relative to the equatorial plane of the tyre.

Abstract: In a pneumatic tire, a modulus at 300% elongation of a cap tread ranges from 3.0 Mpa to 7.0 Mpa, and the modulus at 300% elongation of an undertread ranges from 10.0 Mpa to 20.0 Mpa. Additionally, an earthing tread is made from a rubber material with a volume resistivity of 1×10{circumflex over (?)}7 ?·cm or less. The earthing tread is made from the same rubber material as the undertread and has an integral structure with the undertread.

Abstract: Provided is a pneumatic tire comprising a tread, sidewalls, a belt, and dimpled patterns, wherein each dimpled pattern is adapted to modify air flow and temperature. The tread defines the outward surface of the tire and extends in a radial direction, a circumferential direction, and a lateral direction. Each sidewall extends radially inwardly along a curved path from the tread to a bead and defines a lateral surface having maximum lateral extent. The belt extends under the tread. Each dimpled pattern is a surface treatment etched from a sidewall maximum lateral extent over a belt edge and onto the tread. Each dimpled pattern surface treatment modifies air flow at 180 mph over the tire to turbulent flow, and reduces steady state operating temperatures of the sidewalls.

Abstract: A pneumatic radial tyre includes a plurality of shoulder lateral grooves crossing shoulder lard regions. In a cross-sectional view of at least one of the shoulder lateral grooves taken along a groove width center line thereof, a groove bottom of the shoulder lateral groove includes a first bottom surface portion arranged on an inner side in a tyre axial direction and a second bottom surface portion extending between the first bottom surface portion and the tread surface outer end in a concave arc shape having a radius of curvature.

Abstract: A tire 1 comprises a tread portion 2 comprising shoulder blocks 3 and crown blocks 4. The shoulder blocks 3 each has a ground contacting surface (3t) comprising an axially outer portion 6 extending axially inwardly from one of tread edges (Te) and a steeply oblique portion 7 extending axially inwardly from the axially outer portion 6 with a larger inclination angle with respect to the tire axial direction than the axially outer portion 6. The crown blocks 4 each has a ground contacting surface (4t) comprising a first oblique portion 10 inclined oppositely to the steeply oblique portion 7 and a second oblique portion 11 extending from and obliquely and oppositely to the first oblique portion 10. In a development view of the tread portion 2, longitudinal directions of the steeply oblique portion 7 and the first oblique portion 10 intersect at an angle from 70 to 110 degrees.

Abstract: A pneumatic tire 1 comprises a sidewall portion 3. The sidewall portion 3 comprises an outer surface (3a) provided with a plurality of protruding portions 9 protruding outwardly in a tire axial direction and arranged in a tire circumferential direction. Each of the protruding portions 9 comprises a pair of side surfaces 12 extending in a tire radial direction at both ends in a tire circumferential direction of each of the protruding portions 9 and a top surface 13 arranged outermost in the tire axial direction between the pair of the side surfaces 12. In at least one of the protruding portions 9, the top surface 13 is provided with at least one groove 16.

Abstract: A motorcycle tyre intended to be fitted to the rear wheel of a motorcycle. The motorcycle tyre has a tread pattern with a high void-to-rubber ratio that provides a suitable draining. The tread pattern has pairs of primary grooves to carry out the draining function of the tyre, and arranged substantially according to the stress lines of the tyres to reduce the probability of triggering uneven wear. Also included are secondary grooves having a reduced dimension, in terms of both extension and width, arranged between the primary grooves to increase the grip of the tyre to the ground. Orientation of the secondary grooves increases stabilizing features against drift forces acting on the tyre, particularly in low or very low friction conditions.

Abstract: A motorcycle tire is provided in the tread portion with first inclined main grooves and second inclined main grooves which are arranged alternately in the tire circumferential direction while inclining in opposite directions. The first inclined main grooves extend from a first tread edge toward a second tread edge across the tire equator and terminate at the respective second inclined main grooves which extend from the second tread edge toward the first tread edge across the tire equator and terminate at the respective first inclined main grooves which are respectively next to the above-said first inclined main grooves. A first region, which is delimited by the first tread edge, two of the first inclined main grooves and one of the second inclined main grooves, is provided with blocks whose ground contacting top surfaces have vertices each having an angle of not less than 45 degrees.

Abstract: A tire for running on rough terrain comprises a tread portion 2 bound with an intended tire rotational direction. The tread portion 2 comprises a row of crown blocks 10 and rows of middle blocks 11. The crown blocks 10 and the middle blocks 11 each has an axially-elongated shape. A crown front edge 15 of each of the crown block 10 comprises a most concave portion 18 positioned at the most toe-side thereof in the tire rotational direction and a pair of inclined edges 20 extending from the most concave portion 18 toward axially both sides thereof and toward the heel-side in the tire rotational direction. The inclined edges 20 are each inclined at an angle from 10 to 45 degrees with respect to the tire axial direction. A middle front edge 21 of each of the middle blocks 11 extends axially outwardly and is inclined to the heel-side.

Abstract: A motorcycle tyre with a low void-to-rubber ratio while providing a stiffness suitable for good performance on dry ground and on track. A tread band with grooves is arranged to provide a draining effect without structurally weakening the tread band. According to one aspect, the tread band has a tread pattern with two pairs of grooves having segments or portions that produce a warming effect when the compound of the tread band is cold. The tread band provides grip to the ground and limited local warming when the compound of the tread band is at the operating temperature or when driving on dry ground, to provide stiffness and readiness of response.

Abstract: A tire 1 comprises a tread portion 2 provided with blocks 10 so that the tread portion has a land ratio of from 18% to 35%. The blocks 10 include grooved blocks 10 provided with a zoning groove 16 which defines a tall section 12 of the grooved block having a ground contacting higher top surface 13, and a short section 14 of the grooved block having a ground contacting lower top surface 15 positioned radially inside the higher top surface 13. The depth da of the zoning groove 15 measured from the lower top surface 15 is less than 20% of the maximum radial height H1 of the grooved block 10.

Abstract: Provided is a motorcycle tire having improved wet performance during straight running without compromising other performances. The motorcycle tire is a motorcycle tire whose rotation direction when mounted on a vehicle is designated.

Abstract: Disclosed is a motorcycle pneumatic tire comprising a plurality of blocks arranged on a tread surface, wherein: a plurality of wide blocks, each having a tire widthwise length larger than a tire circumferential length, are formed in at least a central region and intermediate regions, and a plurality of narrow blocks, each having a smaller tire widthwise length than each of the wide blocks, are formed in at least the intermediate regions; and the following relations are satisfied: 1.5?W1/L1?4.0 . . . (A), 0.5?W2/L2?1.5 . . . (B), 0.3?S1M/S1?0.6 . . . (C), and 0.5?S2M/S2?1.0 . . . (D).

Abstract: A pneumatic tire includes a tread portion provided with central blocks on both sides of a tire equator. Each of the central blocks includes a ground contact surface with an axially outer block edge and an outer block sidewall extending radially inwardly from the outer block edge. Each outer block edge includes a first inclined edge and a second inclined edge in an opposite inclination direction to the first inclined edge. The first inclined edge has an average angle of from 75 to 85 degrees and the second inclined edge has an average angle of from 30 to 50 degrees, with respect to the axial direction of the tire. Each outer block sidewall includes a middle portion and a pair of end portions, wherein the middle portion is inclined gently with respect to the end portions in relation to a radial direction of the tire.

Abstract: A motorcycle tire includes a tread portion provided with a zigzag central main groove, first lateral grooves, second lateral grooves and shoulder grooves. The central main groove includes first inclined elements each with a first angle, second inclined elements each with a second angle in an opposite direction to the first inclined elements, and corners each between first and second elements and located within a crown region. Each first lateral groove extends from each corner with a third angle not less than the first and second angles. Each second lateral groove extends from one of the first and second inclined elements in an opposite direction to the first or second inclined element to which the second lateral groove is connected. Each shoulder groove is disposed outside the crown region and is connected to one of the second lateral grooves.

Abstract: A pneumatic tire include a tread portion with a designated installing direction to a vehicle to define an outboard tread edge and an inboard tread edge, the tread portion including an inboard portion defined between the inboard tread edge and a tire equator and an outboard portion defined between the outboard tread edge and the tire equator. The inboard portion is provided with a circumferentially and continuously extending first main groove and a circumferentially and continuously extending second main groove arranged between the first main groove and the inboard tread edge. An axial distance from the tire equator to a centerline of the second main groove is in a range of from 0.35 to 0.75 times of a width of the inboard portion. No circumferentially and continuously extending main grooves are provided with the outboard portion.

Abstract: A tire center slant groove near tread surface tire equatorial plane extends toward reverse rotation-direction of designated rotation-direction while slanting from a tire equatorial plane side to a tire-width direction outer side, an extension direction angle forms with respect to a tire circumference-direction within range, 3°-10°; and at center slant groove-end portion in reverse rotation-direction, at least a tire-width direction outer side groove-edge of the center slant groove forms into a circular-arc-shaped portion to have the tire-width direction outer side groove-edge angle formed with respect to tire circumference-direction, the angle increasing toward reverse rotation-direction, the tire-width direction outer side groove-edge angle of the center slant groove forms with respect to tire circumference-direction larger than an angle of a tire-width direction inner side groove-edge of the center slant groove forms with respect to tire circumference-direction, and the center slant groove depth gradually d

Abstract: A motorcycle pneumatic tire for travelling over rough terrain, wherein: the tire has a plurality of fin-like projections provided in the tire circumferential direction with intervals therebetween in an outer surface of the sidewall portion such that the fin-like projections each protrude from the outer surface and extend in the tire radial direction; a surface of at least the end portion on the outer side in the tire radial direction of each fin-like projection is formed to have an arcuate configuration protruding toward the tire inner surface side in a cross section in the width direction of the tire; and the arcuate surface of the end portion on the outer side in the tire radial direction of the fin-like projection is smoothly connected to an outer side surface of a shoulder block provided on the outermost side in the tire width direction of the tread portion.

Abstract: A motorcycle tire includes a tread portion having a designated rotational direction, the tread portion provided with first inclined grooves extending from a central region to a shoulder region, and second inclined grooves extending from a middle region to the shoulder region. Each first inclined groove includes a first tapered portion, and each second inclined groove includes a second tapered portion. In a pair of the first and second inclined grooves that are arranged closest to each other, the second tapered portion is located behind a forward of the first tapered portion such that a straight line connecting between a forward of the second tapered portion and a backward of the first tapered portion has an angle of from 85 to 90 degrees with respect to a circumferential direction of the tire.

Abstract: A pneumatic motorcycle tire includes a tread portion provided in each half tread region with a unit pattern repeatedly arranged in the tire circumferential direction to form a unidirectional tread pattern. The unit pattern includes a first groove extending axially outwardly from a vicinity of the tire equator, while inclining to the opposite direction to the intended tire rotational direction; a second groove disposed on the heel-side in the tire rotational direction of the first groove and extending along the first groove; a third groove disposed on the heel-side of the second groove and extending along the second groove; a fourth groove disposed on the heel-side of the third groove and extending along the third groove; and a narrow groove extending from an axially inner end of the first groove to an axially inner end of the fourth groove, while inclining to the intended tire rotational direction.

Abstract: A motorcycle tire for running on rough terrain includes a tread portion being provided with a first block pair including a shoulder block and a middle block arranged adjacently in an axial direction of the tire through a first groove bottom having a first thinnest rubber portion. The shoulder block includes a ground contact surface with an axially inner edge and a tread edge. The middle block includes a ground contact surface with an axially outer edge. In a first tire cross-section passing the first block pair, a distance from the first thinnest rubber portion to the axially inner edge of the shoulder block is set greater than a distance from the first thinnest rubber portion to the axially outer edge of the middle block.

Abstract: A motor vehicle tire, particularly for front wheels of motor vehicles, has a tread extending around an axis of rotation and includes a central annular portion which straddles an equatorial plane and two annular shoulder portions arranged on axially opposite sides of the central annular portion. The tread band has a void-to-rubber ratio of less than 10%, and the central annular portion has an axial extension less than 40% of the axial development of the tread band and includes at least a pair of first grooves extending substantially longitudinally on opposite sides of the equatorial plane. Each shoulder portion has an axial extension less than 35% of the axial development of the tread band and includes a plurality of second grooves extending substantially transversally forming an average angle with the equatorial plane of more than 90°. The central annular portion has a void-to-rubber ratio more than 0.

Abstract: A tire for a two-wheeled motor vehicle has a tread (2) including: a center region (Cr); a pair of middle regions (Mr) located on both sides of the center region (Cr); and a pair of inner shoulder regions (Sr) located on both sides of the middle regions (Mr). The tread (2) has provided therein: inner tilted grooves (10) having outer ends (10e) provided within the middle regions (Mr); and outer tilted grooves (11) having inner ends (11i) provided within the middle regions (Mr). The groove area ratio of the center region (Cr) is from 34% to 39%, the groove area ratio of the middle regions (Mr) is from 14% to 19%, and the groove area ratio of the inner shoulder regions (Sr) is from 14% to 19%.

Abstract: A motorcycle tire is provided with a tread pattern made up of circumferentially alternately arranged first and second pattern units. The first pattern unit is substantially mirror symmetrical with the second pattern unit. Each pattern unit comprises a main oblique groove and first and second auxiliary oblique grooves, each of which is a bent groove having a bent position and composed of a steeply-inclined part and a mildly-inclined part, in the main oblique groove, the steeply-inclined part extends from a start position on one side of the tire equator to the bent position on the other side of the tire equator, while inclining to one tire circumferential direction; and the mildly-inclined part extends from the bent position to the adjacent tread edge, while inclining to the above-mentioned one tire circumferential direction.

Abstract: A pneumatic tire for motorcycle for running on rough terrain comprises a tread portion 2 provided with a directional tread pattern having an intended tire rotational direction X. The tread portion 2 is provided with crown blocks 4 and middle blocks 5. The crown block 4 comprises an axially long main portion 4m and a protruding portion 4t protruding from an axial central part of the main portion 4m toward the opposite direction of the intended tire rotational direction. In a block group Y consisting of each crown block 4 and two axially adjacent middle blocks 5 disposed one on each side of the crown block 4, the center P1 of gravity of the crown block 4 is positioned on the toe-side of each middle block 5, and the center P2 of gravity of each middle block 5 is positioned on the heel-side of the crown block 4.

Abstract: A motorcycle tire comprises a tread portion provided on each side of the tire equator with primary oblique grooves extending from a tread center region to the vicinity of the tread edge, and secondary oblique grooves each having an axially outer end positioned axially inside the axially outer ends of the primary oblique grooves. The secondary oblique grooves comprises a pair of gradually widening parts respectively extending from two extreme ends of the secondary oblique groove in its longitudinal direction toward an intermediate position between the two extreme ends, while gradually increasing the groove width measured perpendicularly to the longitudinal direction, and a pair of gradually narrowing parts which are disposed between the gradually widening parts, and of which groove widths gradually decrease from the gradually widening parts toward the intermediate position.

Abstract: A pair of motor vehicle tires includes a front tire and a rear tire to be mounted respectively on a front wheel and a rear wheel of a two-wheeled vehicle, each tire of the pair having a tread band extending around an axis of rotation. The tread band of the front tire includes a central annular portion straddling an equatorial plane and two annular shoulder portions disposed on axially opposite sides of the central annular portion. The central annular portion includes at least a pair of first grooves extending substantially longitudinally on opposite sides of the equatorial plane in such a way as to form a concavity directed toward the equatorial plane. Each shoulder portion includes a plurality of second grooves isolated from the first grooves and extending substantially transversally so as to form an average inclination with the equatorial plane greater than 90°.

Abstract: A pneumatic tire comprises a tread portion provided on each side of the tire equator with a middle land portion defined between a shoulder main groove and a crown main groove each extending continuously in the tire circumferential direction. The middle land portion is provided with axially inside middle lug grooves and axially outside middle lug grooves arranged alternately in the tire circumferential direction. The axially inside middle lug groove is connected to the crown main groove at an angle ?1 of from 20 to 45 degrees with respect to the tire circumferential direction and has an axially inner opened end and an axially outer closed end. The outside middle lug grooves is connected to the shoulder main groove at an angle ?2 of from 60 to 80 degrees with respect to the tire circumferential direction and has an axially outer open end and an axially inner closed end.

Abstract: An off-road pneumatic tire has a tread having an outer surface forming a tread surface, the tread including a body and multiple blocks projecting from the body substantially outward in radial direction. The blocks have a center block group, a pair of shoulder block groups and a pair of middle block groups. The center group includes center blocks at interval in circumferential direction on plane of equator. Each shoulder group includes shoulder blocks at interval in the circumferential direction on an edge of the tread surface. Each middle group includes middle blocks at interval in the circumferential direction between the center and one shoulder groups. The center group has units each having first, second, third and fourth center blocks in the order of the first, second, third and fourth blocks in the circumferential direction.

Abstract: A motorcycle tire that improves straight-line traction performance and also improves turning performance is provided. In a motorcycle tire, a condition of LC/T?0.08 is satisfied for center blocks, a condition of LM/LC>1.0 is satisfied for the center blocks and intermediate blocks, and the center blocks and the intermediate blocks are either separate from each other in the tire circumferential direction, or overlap each other in the tire circumferential direction with an overlap region of 0.5 LC or less.

Abstract: The invention relates to a tire having four treads distributed equidistantly on the external part of the body or carcass, which allow the tire to be deflated and rotated in order for a new tread to be placed in contact with the ground when the current tread has been subjected to heavy wear, without the tire having to be replaced. The invention is advantageous for the tire owner since with just a small increase in outlay the owner is guaranteed a tire that will last longer and that can be used for an increased number of kilometers of cycling.

Abstract: A motorcycle tire for running on rough terrain comprises a tread portion provided with a plurality of blocks defining a block pattern. The blocks include center blocks whose centroids of their top surfaces are disposed within a center region of the tread portion defined as being centered on the tire equator and having a developed width of 25% of a developed tread width. The top surface of each of the center blocks is provided with an axially extending edge extending straight and parallel with the tire axial direction, and arc edges curved convexly toward the centroid of the top surface and disposed on both sides of the axially extending edge in the tire axial direction.

Abstract: A motorcycle tire for running on rough terrain has a block pattern that includes major groups arranged circumferentially of the tire at intervals, and minor groups arranged between the major groups. The major group consists of four blocks arranged axially of the tire and each connected to the next with a tie bar, wherein each is defined as having the centroid of its top surface within a tread center region having a developed width of 60% of a developed tread width, and angles (?1a) of straight lines drawn between axially adjacent centroids are not more than 10 degrees with respect to the tire axial direction. The minor group consists of two or three blocks connected with a tie bar, and angles of straight lines drawn between axially adjacent centroids of top surfaces of the blocks are 15 to 80 degrees with respect to the tire axial direction.

Abstract: A motorcycle tire comprises a tread portion provided with first T-grooves and second T-grooves arranged and oriented alternately along the tire equator. The angles of the main portion and branch portion of the T-groove, with respect to the tire circumferential direction, are gradually increased toward the tread edges. The axial distances of the branching point and an inside end of the main portion are not more than 25% of the axial distance of the tread edge, each measured from the tire equator along the tread surface. The circumferential distance from the inside end of the main portion to the circumferentially adjacent T-groove is 5 to 15% of the circumferential pitch length of the first T-grooves.

Abstract: In a pneumatic tire for a motorcycle employing a spiral belt, a crack is inhibited from being generated from the end section of a groove formed on the surface of a tread section to improve abrasion resistance. The pneumatic tire for a motorcycle includes at least a one-layered spiral belt (6) in the perimeter side of a carcass (5) and a groove (14) of which a groove end is located between a central position, between a tire equator (E) and a tread end in the width direction of a tread, and the tread end, on a surface of a tread section (4) in an external side in the radial direction of the tire (1) from the spiral belt (6). In the groove (14), a groove wall which forms the groove end located between the central position, between the tire equator and the tread end in the width direction of the tread, and the tread end, has a chamfered shape in a cross section in the width direction.

Abstract: A motorcycle tire 1 on rough terrain. Blocks 11 include crown blocks 16 arranged in a center area Cr of a tread portion 2, middle blocks arranged axially outside the crown blocks and shoulder blocks arranged axially outside middle blocks. The crown blocks have a smallest aspect ratio. The shoulder blocks have a largest aspect ratio. The crown block 16 includes a shift block. The shift block is provided in a center part in its widthwise direction with one circumferentially extending slit so as to divide the block into two small block segments. The two small block segments are shifted from each other in the tire circumferential direction.

Abstract: The present invention has an object of providing a pneumatic tire having a tread pattern capable of providing both excellent drivability and a high partial wear resistance.

Abstract: The present invention provides structures on the tread of a tire that improve the evacuation of mud, soil and the like. In particular, different tread features are provided that may improve the evacuation of mud, soil and the like by themselves or by strategically combining them. These different tread features may be tested to see how they affect mud evacuation at different rotational speeds by a test apparatus that mimics the performance of a tire. For example, a tread that has offset shoulder tread blocks, which shows good mud evacuation at lower speeds, may be combined with shoulder grooves with pockets that show good mud evacuation at intermediate speeds to see if this combination provides a solution that has the lowest change of speed necessary to evacuate 50-87% of the mud found in the grooves.

Abstract: A motorcycle tire comprises a tread portion provided with a plurality of inner inclined grooves and inclined narrow grooves in both sides of a tire equator, wherein each inner inclined groove extends from an axially inner end to the outer end with an angle of 0-20 degrees with respect to a tire circumferential direction, the inner end of the inner inclined groove is located in a developed length within 5% of a tread half developed-width from the tire equator, each inner inclined groove has a circumferential length of 70-85% of a first pitch, each inclined narrow groove with a groove width of 0.5-2.0 mm is provided between circumferentially adjacent inner inclined grooves and has an angle with respect to a circumferential direction of the tire larger than that of the inner inclined groove.

Abstract: A tire for motor vehicles, having a tread band extending around a rotation axis includes an annular central portion astride an equatorial plane of the tire, two annular shoulder portions arranged on axially opposite sides with respect to the annular central portion and two annular side portions each arranged between the annular central portion and a respective annular shoulder portion, the tread band having at least one module replicated along a circumferential direction of the tire and including at least one plurality of primary grooves inclined with respect to the equatorial plane and arranged at least on the annular portions, and at least one plurality of secondary recesses arranged mainly on the annular central portion and on at least one annular side portion, wherein a substantial disappearance of the secondary recesses determines a difference in the empty/solid ratio on the annular central and side portions between a new tire and a tire that has travelled at least 2000 km greater than 1.7%.

Abstract: A motorcycle tire comprises a tread portion having a tread width between tread edges. The tread portion is provided with a crown oblique groove disposed within a center region of the tread portion is defined as having 30% of the tread width. The center region having a radius of curvature of from 0.60 to 0.75 times the tread width in a meridian section of the tire, and the center region has a land ratio in a range of from 0.75 to 0.95. The crown oblique groove extends continuously or discontinuously in the tire circumferential direction, across the tire equator a plurality of times, and the crown oblique groove is inclined at angles of not more than 20 degrees with respect to the tire circumferential direction.

Abstract: An off-road pneumatic tire has a tread having an outer surface forming a tread surface, the tread including a body and multiple blocks projecting from the body substantially outward in radial direction. The blocks have a center block group, a pair of shoulder block groups and a pair of middle block groups. The center group includes center blocks at interval in circumferential direction on plane of equator. Each shoulder group includes shoulder blocks at interval in the circumferential direction on an edge of the tread surface. Each middle group includes middle blocks at interval in the circumferential direction between the center and one shoulder groups. The center group has units each having first, second, third and fourth center blocks in the order of the first, second, third and fourth blocks in the circumferential direction.

Abstract: Bicycle tires with at least one reinforcement layer that contains strength supports and that is arranged between carcass and tread rubber and/or between carcass layers below the tread rubber and/or within the tread rubber. For a high resistance to puncturing with low weight, the reinforcement layer contains multifilament threads of more than 30 polyester/polyarylate filaments, and the filaments are spun from molten liquid-crystal polymer.

Abstract: A motorcycle tire comprises a tread portion grooved so that twenty narrow annular zones thereof each have a land ratio of 70 to 90%, wherein the twenty narrow annular zones are defined by equally dividing the developed tread width along the tread face by twenty. On each side of the tire equator, main oblique grooves and auxiliary oblique grooves are arranged alternately in the tire circumferential direction and inclined to one tire circumferential direction. The main oblique grooves on each side of the tire equator extend beyond the tire equator to have axially inner ends located on the other side of the tire equator. The auxiliary oblique grooves on each side of the tire equator do not extend beyond the tire equator to have axially inner ends located on the same side of the tire equator.