Motorcycle tire
AssigneeSumitomo Rubber Industries, Ltd.
InventorRyosuke Morimura
Life of this patent
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Abstract
A motorcycle tire comprises a tread portion having a first tread edge, a second tread edge and a ground contacting surface. The ground contacting surface comprises a first ground contacting surface from the tire equator to the first tread edge. When the first ground contacting surface is equally axially divided into a first, a second, a third, a fourth and a fifth zone in order from the tire equator to the first tread edge, a land ratio of the second zone is larger than a land ratio of the first zone and larger than a land ratio of the third zone.
Claims18
A motorcycle tire comprising a tread portion having a first tread edge, a second tread edge and a ground contacting surface therebetween,
- the ground contacting surface comprising a first ground contacting surface from a tire equator to the first tread edge,
- when the first ground contacting surface is divided equally in a developed width direction of the first ground contacting surface into five zones which are a first zone, a second zone, a third zone, a fourth zone and a fifth zone in order from the tire equator to the first tread edge,
- a land ratio La2 of the second zone is larger than a land ratio La1 of the first zone and larger than a land ratio La3 of the third zone,
- the land ratio La3 of the third zone is larger than the land ratio La1 of the first zone,
- a land ratio La4 of the fourth zone is larger than the land ratio La3 of the third zone, and
- a land ratio La5 of the fifth zone is larger than the land ratio La4 of the fourth zone.
A motorcycle tire comprising a tread portion having a pair of tread edges and a half ground contacting surface defined as extending from a tire equator to each of the tread edges,
- wherein
- when the half ground contacting surface is divided equally in a developed width direction of the half ground contacting surface into five zones which are a first zone, a second zone, a third zone, a fourth zone and a fifth zone in order from the tire equator to the one of the tread edges, a land ratio La2 of the second zone is largest among the five zones,
- the half ground contacting surface is formed by a crown tread rubber and a shoulder tread rubber which are made of different rubber compounds, wherein
- a loss tangent at 0 degrees C. of the crown tread rubber is larger than a loss tangent at 0 degrees C. of the shoulder tread rubber, and
- a loss tangent at 70 degrees C. of the shoulder tread rubber is larger than a loss tangent at 70 degrees C. of the crown tread rubber, and
- a boundary between the crown tread rubber and the shoulder tread rubber in the half ground contacting surface is positioned in the third zone or alternatively in the fourth zone.
Dependencies are inferred from the claim text.