Patent classifications
B60C9/28
PNEUMATIC TIRE
An outermost end of a carcass folded-up portion is located in a tire width direction inside than an end in the tire width direction of the outermost inclined belt layer, in the tire radial direction between a carcass main body portion and the innermost inclined belt layer. A carcass cord in the folded-up portion located on the outermost side of the tire and a belt cord of the outermost inclined belt layer cross each other to be inclined in the same direction in a tire circumferential direction as being from one side toward the other side in the tire width direction, a difference in inclination angle is 30° or less, a width of the outermost inclined belt layer is larger than that of the innermost inclined belt layer, and in-plane rigidity per unit width of the innermost inclined belt layer is higher than that of the outermost inclined belt layer.
PNEUMATIC TIRE
The pneumatic tire includes a carcass layer, a belt layer disposed on an outer side of the carcass layer in a radial direction, and a tread rubber disposed on an outer side of the belt layer in the radial direction. Additionally, the carcass layer has a cord angle of 80° or more and 100° or less. Additionally, the belt layer is formed by layering a first reinforcing belt, a second reinforcing belt that is narrower than the first reinforcing belt, and an auxiliary belt that is spaced apart from a tire equatorial plane and disposed between the carcass layer and the first reinforcing belt. Additionally, the first reinforcing belt has a cord angle of 11° or more and 30° or less, the second reinforcing belt has a cord angle of 1° or more and 11° or less, and the auxiliary belt has a cord angle of 55° or more and 70° or less.
Tyre
A tyre includes a tread portion being provided with a pair of shoulder circumferential grooves on an outer surface thereof and a tread reinforcing layer disposed in the tread portion. The tread reinforcing layer includes a circumferential belt layer having a plurality of first reinforcing cords oriented along a tyre circumferential direction. The circumferential belt layer includes a pair of axially spaced first circumferential belt plies extending in radially inner regions of the pair of shoulder circumferential grooves. The pair of first circumferential belt plies is arranged apart from one another at a distance L equal to or more than 20 mm in a tyre axial direction.
PNEUMATIC TIRE
A pneumatic tire is provided. A bead filler is disposed on an outer circumferential side of each bead core in bead portions, a side reinforcing layer having a crescent-shaped cross-section is disposed on an inner side in a tire width direction of a carcass layer in a sidewall portion, and as physical properties of a rubber that constitutes the side reinforcing layer and a rubber that constitutes the bead filler, a modulus at 100% elongation is in a range from 8.4 MPa to 10.2 MPa, a tan δ at 60° C. is in a range from 0.04 to 0.08, and JIS hardness at 20° C. is in the range from 75 to 79.
Motorcycle tire
A motorcycle tire includes a tread portion, a pair of sidewall portions, a pair of bead portions, a toroidal carcass extending between the pair of bead portions, and a belt layer and a band layer disposed outwardly in the tire radial direction of the carcass in the tread portion. The carcass includes a plurality of carcass cords. The band layer includes a jointless band ply having a band cord wound spirally at an angle equal to or less than 5 degrees with respect to a tire circumferential direction. The belt layer includes a plurality of belt cords arranged in a direction intersecting with the carcass cords. The belt cords intersect with the carcass cords at an intersection angle θc in a tread crown region, and intersect with the carcass cords at an intersection angle θs in tread shoulder regions, and the intersection angle θc is greater than the intersection angle θs.
Heavy-duty tire
A heavy-duty tire comprises a tread reinforcing belt comprising first to fourth belt plies each composed of belt cords inclined with respect to the tire equatorial plane. The first radial distance L1 between the belt cords of the third belt ply and the belt cords of the fourth belt ply is not more than the second radial distance L2 between the belt cords of the second belt ply and the belt cords of the third belt ply. The cord count E4 of the fourth belt ply is smaller than the cord count E3 of the third belt ply.
Heavy-duty tire
A heavy-duty tire comprises a tread reinforcing belt comprising first to fourth belt plies each composed of belt cords inclined with respect to the tire equatorial plane. The first radial distance L1 between the belt cords of the third belt ply and the belt cords of the fourth belt ply is not more than the second radial distance L2 between the belt cords of the second belt ply and the belt cords of the third belt ply. The cord count E4 of the fourth belt ply is smaller than the cord count E3 of the third belt ply.
Pneumatic tire and method of manufacturing pneumatic tire
In order to improve shock burst resistance performance while suppressing a decrease in separation resistance performance, a pneumatic tire includes a tread portion, a belt layer, and a belt cover layer. The belt layer is disposed in the tread portion. The belt cover layer is disposed on an outer side in a tire radial direction of the belt layer. The belt cover layer includes: two layers of full covers disposed between shoulder regions on both sides in a tire width direction and layered in the tire radial direction; and a narrow cover formed with a width in the tire width direction narrower than widths of the full covers. The narrow cover is disposed at a position between the two layers of the full covers and on an inner side in the tire width direction than the shoulder regions.
IMPROVED TIRE
The present invention relates to a tyre (1) comprising:—a carcass (5);—at least one high elongation belt (1, 2, 3, 4), being applied as a single cord externally to said carcass (5); and—an external tread portion (6), provided with two or more grooves (7) extending according to a circumferential direction (L) around said tread portion (6), wherein the axial width (Wg) of at least one of said grooves (7), measured according to an axial direction (A) parallel to an axis of rotation (R) of said tyre (10) and orthogonal to said circumferential direction (L), is at most equal to 2 millimeters.
IMPROVED TIRE
The present invention relates to a tyre (1) comprising:—a carcass (5);—at least one high elongation belt (1, 2, 3, 4), being applied as a single cord externally to said carcass (5); and—an external tread portion (6), provided with two or more grooves (7) extending according to a circumferential direction (L) around said tread portion (6), wherein the axial width (Wg) of at least one of said grooves (7), measured according to an axial direction (A) parallel to an axis of rotation (R) of said tyre (10) and orthogonal to said circumferential direction (L), is at most equal to 2 millimeters.