Abstract: A pneumatic tire for a motorcycle includes a tread reinforcing cord layer and a tread rubber. The tread rubber includes a base rubber layer and a pair of shoulder rubber layers. The base rubber layer includes a cover portion covering at least the tread reinforcing cord layer over an entire width thereof and a convex portion protruding radially outwardly from the cover portion to form a crown ground contacting surface. The shoulder rubber layers are arranged radially outside the cover portion to form shoulder ground contacting surfaces. The base rubber layer is made of a first rubber composition having larger hardness than the shoulder rubber layers, and the shoulder rubber layers are made of a second rubber composition containing larger amount of oil component than the base rubber layer.

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 for a motorcycle includes a tread reinforcing cord layer and a tread rubber. The tread rubber includes a base rubber layer and a pair of shoulder rubber layers. The base rubber layer includes a cover portion covering at least the tread reinforcing cord layer over an entire width thereof and a convex portion protruding radially outwardly from the cover portion to form a crown ground contacting surface. The shoulder rubber layers are arranged radially outside the cover portion to form shoulder ground contacting surfaces. The base rubber layer is made of a first rubber composition having larger hardness than the shoulder rubber layers, and the shoulder rubber layers are made of a second rubber composition containing larger amount of oil component than the base rubber layer.

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: It is an object to provide a tire for a motorcycle which does not damage a stability in a transition between straight running and cornering but is excellent in various performances. A tire (2) includes a tread (4). The tread (4) is divided into (2N?1) parts (N is a natural number which is equal to or greater than four). The tread (4) is divided into a first region (20) positioned on a center region and a second region (22) to an Nth region in order from the center region toward a shoulder region. The second region (22) to the Nth region make a pair of regions which are symmetrical with respect to an equator plane of the tire. The first region (20) to the Nth region are formed by crosslinked rubber compositions respectively and materials of the respective regions are different from each other. In the first region (20) to the Nth region, a rubber hardness of the region on the adjacent center side is equal to or higher than a rubber hardness of the region on the shoulder side.

Abstract: It is an object to provide a tire for a motorcycle which does not damage a stability in a transition between straight running and cornering but is excellent in various performances. A tire (2) includes a tread (4). The tread (4) is divided into (2N?1) parts (N is a natural number which is equal to or greater than four). The tread (4) is divided into a first region (20) positioned on a center region and a second region (22) to an Nth region in order from the center region toward a shoulder region. The second region (22) to the Nth region make a pair of regions which are symmetrical with respect to an equator plane of the tire. The first region (20) to the Nth region are formed by crosslinked rubber compositions respectively and materials of the respective regions are different from each other. In the first region (20) to the Nth region, a rubber hardness of the region on the adjacent center side is equal to or higher than a rubber hardness of the region on the shoulder side.