Pneumatic tire
AssigneeSumitomo Rubber Industries, Ltd.
InventorKazuma Kodaka
Life of this patent
Estimating the term…
Abstract
A pneumatic tire includes a tread portion including an inboard tread region between a tire equator and an inboard tread edge, and an outboard tread region between the tire equator and an outboard tread edge. The inboard tread region is provided with a first main groove extending and a second main groove each extending continuously in the tire circumferential direction. The outboard tread region is provided with a plurality of recesses that are not in communication with other grooves. The recesses include a plurality of deep bottom recesses having depths equal to or more than 5 mm. A total of opening areas of the deep bottom recesses on a ground contact surface of the tread portion is equal to or less than 5% of a surface area of the outboard tread region that is obtained by filling up all grooves and recesses provided thereon.
Claims18
A pneumatic tire comprising:
- a tread portion having an installing direction to a vehicle to define an outboard tread edge and an inboard tread edge, the tread portion comprising an inboard tread region between a tire equator and the inboard tread edge, and an outboard tread region between the tire equator and the outboard tread edge;
- wherein the inboard tread region is provided with only two circumferentially continuously extending main grooves consisting of a first main groove extending continuously in a tire circumferential direction on the side of the inboard tread edge and a second main groove extending continuously in the tire circumferential direction on the side of the tire equator, wherein the first main groove is not connected to any other grooves,
- wherein a region between the first main groove and the inboard tread edge is provided with lateral grooves consisting of first lateral grooves each having one end in communication with the inboard tread edge and the other end not in communication with the first main groove;
- wherein the outboard tread region is provided with a plurality of recesses that are not in communication with other grooves, and the outboard tread region is not provided with any circumferentially continuously extending grooves;
- wherein the plurality of recesses comprises a plurality of deep bottom recesses having depths equal to or more than 5 mm;
- and
- wherein a total of opening areas of the deep bottom recesses on a ground contact surface of the tread portion is equal to or less than 5% of a surface area of the outboard tread region that is obtained by filling up all recesses provided thereon.
A pneumatic tire comprising:
- a tread portion having an installing direction to a vehicle to define an outboard tread edge and an inboard tread edge, the tread portion comprising an inboard tread region between a tire equator and the inboard tread edge, and an outboard tread region between the tire equator and the outboard tread edge;
- wherein the inboard tread region is provided with only two circumferentially continuously extending main grooves consisting of a first main groove extending continuously in a tire circumferential direction on the side of the inboard tread edge and a second main groove extending continuously in the tire circumferential direction on the side of the tire equator, wherein the first main groove is not connected to any other grooves;
- wherein the outboard tread region is provided with a plurality of recesses that are not in communication with other grooves, and the outboard tread region is not provided with any circumferentially continuously extending grooves;
- wherein the plurality of recesses comprises a plurality of deep bottom recesses having depths equal to or more than 5 mm;
- and
- wherein a total of opening areas of the deep bottom recesses on a ground contact surface of the tread portion is equal to or less than 5% of a surface area of the outboard tread region that is obtained by filling up all recesses provided thereon.
Dependencies are inferred from the claim text.