Abstract: The tire includes: a carcass toroidally extending between a pair of bead portions; a spiral cord layer arranged on an outer side in a tire radial direction of a crown portion of the carcass and in which an upper layer and a lower layer are formed by spirally winding a reinforcing cord; and an auxiliary belt layer arranged on the outer side in the tire radial direction of the spiral cord layer. At least at ends in a tire width direction of a region where the spiral cord layer and the auxiliary belt layer are laminated, a 100% modulus of at least a rubber other than a coating rubber of the auxiliary belt layer among rubbers interposed between the spiral cord layer and the auxiliary belt layer is lower than a 100% modulus of the coating rubber of the auxiliary belt layer.

Abstract: Provided is a technology with which, in a tire including a spiral cord layer in a crown portion, the occurrence of separation at a tire width-direction end of the spiral cord layer can be inhibited. A tire (10) includes: a carcass (14), which toroidally extends between a pair of bead portions; and a spiral cord layer (1), which is arranged on a tire radial-direction outer side of the carcass in a crown portion and in which an upper layer (1A) and a lower layer (1B) are formed by spirally winding reinforcing cords. In this tire (10), the reinforcing cords of the spiral cord layer have an angle in a range of 10° to 45° with respect to a tire circumferential direction, a belt under-cushion rubber (18) is arranged on a tire radial-direction inner side of a tire width-direction end of the spiral cord layer, and the belt under-cushion rubber has a 100% modulus in a range of 1 to 6 MPa.

Abstract: A tire including a spiral cord layer constituted by a reinforcing cord in a crown portion of the tire, in which the occurrence of separation between the spiral cord layer and an auxiliary belt layer is suppressed when the auxiliary belt layer is arranged on a tire radial-direction outer side of the spiral cord layer. The tire includes: a carcass which toroidally extends between a pair of bead portions; and a spiral cord layer which is arranged on the tire radial-direction outer side of the carcass in the crown portion and in which an upper layer and a lower layer are formed by spirally winding a reinforcing cord. An auxiliary belt layer is arranged on the tire radial-direction outer side of the spiral cord layer, and belt cords of the auxiliary belt layer have an angle in a range of 30° to 90° with respect to a tire circumferential direction.

Abstract: This disclosure relates to a tire including a spiral cord layer and core-material cord layer arranged between an upper and lower layer of spiral cord layer in a tire crown portion, both the occurrence of groove cracking and occurrence of separation from width-direction end of core-material cord layer can be suppressed. The tire can include carcass which toroidally extends between pair of bead portions; spiral cord layer which is arranged on tire radial-direction outer side of carcass in crown portion and in which an upper and lower layer are formed by spirally winding reinforcing cord; and core-material cord layer which is arranged between upper and lower layer of spiral cord layer. The reinforcing cord of spiral cord layer are composed of carbon fibers, and core-material cords of core-material cord layer have an angle in a range of 0° to 50° with respect to a tire circumferential direction.

Abstract: A tire that has a spiral cord layer including reinforcing cords on a tire crown portion to inhibit breakage of the reinforcing cords caused by a projection input given to an end of the spiral cord layer during running. The tire includes: a carcass toroidally extending between a pair of bead portions; and a spiral cord layer 1 disposed tire-radially outside the crown portion of the carcass and including an upper layer and a lower layer that are formed by spirally winding the reinforcing cords. An auxiliary belt layer is disposed tire-radially outside the spiral cord layer and an angle of belt cords in the auxiliary belt layer with respect to a tire circumferential direction is in a range of 0° to 45°.

Abstract: Technology for suppressing, in tire including spiral cord and auxiliary belt layers, occurrence of separation between spiral cord and auxiliary belt layers. Tire includes: carcass toroidally extending between pair of bead portions; spiral cord layer arranged on outer side in tire radial direction of crown portion of carcass and wherein upper and lower layers formed by spirally winding reinforcing cord; and auxiliary belt layer arranged on outer side in tire radial direction of spiral cord layer. Inclination direction of belt cords of auxiliary belt layer and inclination direction of reinforcing cord of upper layer of spiral cord layer are same when angle ? of belt cords of auxiliary belt layer with respect to tire circumferential direction is 54.7°<?<90°, and these inclination directions are different when angle ? of belt cords of auxiliary belt layer with respect to tire circumferential direction is 0°<?<54.7°.

Abstract: A method to provide technology for suppressing, in a tire including a spiral cord layer and an auxiliary belt layer, the occurrence of separation between the spiral cord layer and the auxiliary belt layer. The tire includes: a carcass toroidally extending between a pair of bead portions; a spiral cord layer arranged on an outer side in a tire radial direction of a crown portion of the carcass and in which an upper layer and a lower layer are formed by spirally winding a reinforcing cord; and an auxiliary belt layer arranged on the outer side in the tire radial direction of the spiral cord layer. At least at ends in a tire width direction of a region where the spiral cord layer and the auxiliary belt layer are laminated, a rubber gauge between the spiral cord layer and the auxiliary belt layer is 0.5 mm to 14.0 mm.