Motorcycle tire
AssigneeSumitomo Rubber Industries, Ltd.
InventorMasafumi Otani
Life of this patent
Estimating the term…
Abstract
A motorcycle tire has a unidirectional tread pattern having an intended rotational direction. The tread portion is provided on each side of the tire equator with main oblique grooves, each comprising a main portion extending from the tire equator toward a tread edge while inclining toward the direction opposite to the intended rotational direction. The main portion includes a part overlapping the tire equator which part has an inclination angle of not more than 20 degrees with respect to the tire equator. The main portion has such a dimension that the circumferential ends thereof are positioned outside a ground contacting area of the tire in its normally inflated loaded state at the camber angle of 0 degree. The land ratio of a tread center region between the ground contact edges is in a rage of from 75 to 95%.
Claims12
A motorcycle tire having an intended rotational direction and comprising
- a tread portion having a pair of tread edges and provided on each side of the tire equator with main oblique grooves, wherein
- each said main oblique groove comprises a main portion extending from the tire equator toward one of the tread edges while inclining to the direction opposite to the intended rotational direction,
- the main portion further extending over the tire equator toward the other tread edge so that the main portion includes a part extending in a circumferential direction at an inclination angle of not more than 20 degrees with respect to the tire equator while overlapping the tire equator,
- the main portion has such a dimension that the circumferential ends thereof are positioned outside a ground contacting area of the tire in a normally inflated loaded state of the tire at a camber angle of zero degrees when the circumferential center of the maximum circumferential length of said ground contacting area coincides with the center of the circumferential range of a part of the tire equator overlapping the main portion, wherein the circumferential range is in a range of from 0.4 to 1.0 times the maximum circumferential length of said ground contacting area, and
- the tread portion is provided between the ground contact edges with a land ratio of from 75 to 95%, wherein the ground contact edges are the axially outermost edges of the ground contacting area.
A motorcycle tire having an intended rotational direction and comprising
- a tread portion having a pair of tread edges and provided on each side of the tire equator with main oblique grooves, wherein
- each said main oblique groove comprises a main portion extending from the tire equator toward one of the tread edges while inclining to the direction opposite to the intended rotational direction, and a sub portion extending in the tire circumferential direction from a toe-side end of the main portion toward the intended tire rotational direction,
- the main portion includes a part overlapping the tire equator which part has an inclination angle of not more than 20 degrees with respect to the tire equator,
- the main portion has such a dimension that the circumferential ends thereof are positioned outside a ground contacting area of the tire in a normally inflated loaded state of the tire at a camber angle of zero degrees when the circumferential center of the maximum circumferential length of said ground contacting area coincides with the center of the circumferential range of a part of the tire equator overlapping the main portion, and
- the tread portion is provided between the ground contact edges with a land ratio of from 75 to 95%, wherein the ground contact edges are the axially outermost edges of the ground contacting area.
A motorcycle tire having an intended rotational direction and comprising
- a tread portion having a pair of tread edges and provided on each side of the tire equator with main oblique grooves, wherein
- each said main oblique groove comprises a main portion extending from the tire equator toward one of the tread edges while inclining to the direction opposite to the intended rotational direction,
- the main portion includes a part overlapping the tire equator which part has an inclination angle of not more than 20 degrees with respect to the tire equator,
- the main portion has such a dimension that the circumferential ends thereof are positioned outside a ground contacting area of the tire in a normally inflated loaded state of the tire at a camber angle of zero degrees when the circumferential center of the maximum circumferential length of said ground contacting area coincides with the center of the circumferential range of a part of the tire equator overlapping the main portion, and
- the tread portion is provided between the ground contact edges with a land ratio of from 75 to 95%, wherein the ground contact edges are the axially outermost edges of the ground contacting area,
- and wherein
- the tread portion is provided on each side of the tire equator with auxiliary oblique grooves not overlapping with the tire equator,
- the auxiliary oblique grooves are inclined toward the direction opposite to the intended tire rotational direction from its axially inner end to its axially outer end,
- the auxiliary oblique grooves include an inwardly shifted auxiliary oblique groove which is disposed on one side of the tire equator and whose heel-side end overlaps in the tire axial direction with the heel-side end of the main oblique groove on the other side of the tire equator.
Dependencies are inferred from the claim text.