| CPC B60C 9/2204 (2013.01) [B60C 2009/2022 (2013.01); B60C 2009/2252 (2013.01); B60C 2200/10 (2013.01)] | 7 Claims |
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1. A motorcycle tire comprising:
a tread portion having a pair of tread edges defining a maximum tire width, the pair of tread edges being located radially inwardly with respect to a tire section height at a tire equator;
a pair of sidewall portions;
a pair of bead portions each with a bead core therein;
a carcass extending between the bead cores through the tread portion and the pair of sidewall portions; and
a tread reinforcing layer arranged outwardly in a tire radial direction of the carcass in the tread portion,
wherein
the tread reinforcing layer comprises a belt layer and a band layer,
the belt layer comprises a single inner belt ply adjacent to the carcass and a single outer belt ply arranged outwardly in the tire radial direction of the inner belt ply,
the band layer comprises at least one band ply arranged between the inner belt ply and the outer belt ply in the tire radial direction adjacently to both the inner belt ply and the outer belt ply,
the inner belt ply comprises a plurality of belt cords oriented at a first angle greater than 5 degrees with respect to a tire circumferential direction and a first development width,
the first angle ranges from 50 to 80 degrees,
the outer belt ply comprises a plurality of belt cords oriented at a second angle greater than 5 degrees with respect to the tire circumferential direction and a second development width,
the second angle is 90 degrees,
the at least one band ply comprises a plurality of band cords oriented at an angle equal to or less than 5 degrees with respect to the tire circumferential direction,
the second development width is greater than the first development width,
the tread portion comprises a pair of rubber layers arranged outwardly in the tire axial direction of the band ply,
the pair of rubber layers is disposed between the inner belt ply and the outer belt ply,
a distance between the inner belt ply and the outer belt ply at the position where the pair of rubber layers is arranged is substantially constant at 0.5 to 3.0 mm,
an innermost end in the tire axial direction of each rubber layer is directly connected to an axially outermost end of the band ply,
each rubber layer has a complex elastic modulus equal to or more than 500 kPa at 70 degrees C.,
each rubber layer has a thickness that is the same as the band ply thickness, and
the sum of development widths W4 of the pair of rubber layers and a third development width W3 of the band ply (W3+2*W4) is smaller than the first development width W2 of the inner belt ply.
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