Motorcycle tire
AssigneeSumitomo Rubber Industries, Ltd.
InventorKota MATSUURA
Life of this patent
Estimating the term…
Abstract
A motorcycle tire comprises a carcass and a tread reinforcing layer. The tread reinforcing layer comprises a belt and a band. The band is composed of a jointless band ply having a developed width less than 65% of the developed tread width. The belt is composed of at least one belt ply having a developed width of 65% or more of the developed tread width. At first positions, the intersecting angle between the belt cords and the carcass cords is 20 to 60 degrees. In the tread portion in a tire meridional cross sectional view, a single arc passing through a point on the tread surface at the tire equator and two points on the tread surface at the tread edges has a radius of not more than 0.7 times the maximum tire cross-section width.
Claims9
A motorcycle tire comprising:
- a tread portion having a tread surface between a pair of tread edges,
- a toroidal carcass comprising at least one carcass ply of carcass cords,
- a tread reinforcing layer disposed radially outside the carcass in the tread portion,
- the tread reinforcing layer comprising a band and a belt,
- the band comprising a jointless band ply of one or more band cords wound spirally and circumferentially of the tire at an angle of not more than 5 degrees with respect to the tire circumferential direction, the jointless band ply being centered on the tire equator, and having a developed width of less than 65% of a developed width of the tread portion,
- the belt comprising one or more belt plies of parallel belt cords, the one or more belt plies being centered on the tire equator, and having a developed width of not less than 65% of the developed tread width,
- wherein
- at a first position axially inwardly spaced apart from each tread edge by a developed distance of 10% to 15% of the developed tread width,
- an intersecting angle between the belt cords and the carcass cords is in a range from 20 to 60 degrees, and
- in a meridional cross section of the tire, including the tire rotation axis, under its a normal state, a single-radius circular arc passing through a point on the tread surface at the tire equator and two points on the tread surface at the tread edges has a radius of not more than 0.7 times a section width of the tire.
Dependencies are inferred from the claim text.