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US 2018/0001711 A1Published application
Pneumatic tire
AssigneeToyo Tire & Rubber Co., Ltd.
InventorTsuyoshi Fujioka
Life of this patent
Estimating the term…
Abstract
In a pneumatic tire, three or four zigzag main grooves extending in a tire circumferential direction with amplitude in a tire width direction, a plurality of lateral grooves extending in a direction intersecting the main grooves, and block rows formed by the main grooves and the lateral grooves are provided at a tread portion. When a tire is grounded, a ratio of a total sum of lengths of groove center lines of the main grooves in a ground contact surface to a total sum of lengths of amplitude center lines of the main grooves in the ground contact surface is set to 1.05 to 1.25.
Claims6
A pneumatic tire comprising:
- a tread portion which is provided with three or four zigzag main grooves extending in a tire circumferential direction with amplitude in a tire width direction, a plurality of lateral grooves extending in a direction intersecting the main grooves, and block rows formed by the main grooves and the lateral grooves,
- wherein the tread portion has a ground contact surface when a tire is grounded, and a ratio LA/LB of a total sum LA of lengths of groove center lines of the main grooves in the ground contact surface to a total sum LB of lengths of amplitude center lines of the main grooves in the ground contact surface is 1.05 to 1.25.
Dependencies are inferred from the claim text.