Patent ID: 9290063
Filing Date: 2016-03-22
CPC Classification: B60C

Claim Text:
1. A motorcycle tire for uneven terrain comprising: a tread having an outer surface which forms a tread surface; a pair of beads; a carcass which is located inwardly from the tread in a radial direction, and extends on and between each of the beads; and a belt located between the tread and the carcass, wherein the carcass includes a first ply and a second ply which are turned up around each bead, the first ply includes: a first body that extends from an equator plane toward each bead; and a pair of first turned-up portions that extend approximately outward from the first body in the radial direction, the second ply includes: a second body that extends from the equator plane toward each bead; and a pair of second turned-up portions that extend approximately outward from the second body in the radial direction, the belt includes a first layer and a second layer that extend in an axial direction and that are layered over each other in the radial direction, ends of the second layer are located inwardly from ends, respectively, of the first layer in the axial direction, and the end of the first layer is layered over the second body of the second ply, the tread includes a plurality of blocks that extend approximately outward in the radial direction, separated from one another by grooves, some of which blocks may have recesses located in their surface, wherein the plurality of blocks are arranged so as to be intermittently divided from one another in a circumferential direction and an axial direction, and the plurality of blocks include shoulder blocks that are located on outer sides in the axial direction, wherein a land is defined as an area of a tread surface which is not recessed and a sea is defined as an area of the tread which is constituted by a groove and a land to sea ratio is equal to or greater than 10% and equal to or less than 30%, a portion of each of the first turned-up portions extends beyond a corresponding one of the ends of the second turned-up portions, the portion of each of the first turned-up portions is layered over the first layer, each of the first turned-up portions is not layered over the second layer, ends of the first turned-up portions are located close to the ends, respectively, of the second layer, and each of the second turned-up portions are located close to the ends, respectively, of the first layer, inwardly from the shoulder blocks in the radial direction, the ends of the first turned-up portions and the ends of the second turned-up portions and the ends of the first layer and the ends of the second layer are located between ends of the tread surface and ends of the side surfaces of the shoulder blocks, respectively, in the radial direction, each of the beads includes a core and an apex that extends outward from the core in the radial direction, the apex is formed of a crosslinked rubber composition, a complex elastic modulus of the apex is less than or equal to 40 MPa, a loss tangent of the apex is less than or equal to 0.10, and the second body is brought into contact with each of the second turned-up portions at an outer side of the apex in the radial direction, and said tire is suitable for use when an internal air pressure of the tire is 80 kPa.