Reifen

Details

Veröffentlichungs-Nr.

EP3995323

Aktenzeichen

EP21205570

Anmeldetag

29. Oktober 2021

Veröffentlichung

23. August 2023

Erteilung

23. August 2023

Rechtsraum

EP

IPC

B60C11/00B60C11/03B60C13/00

Abstract

It is an object of the present disclosure to provide a tire having improved overall performance of fuel efficiency and steering stability. Provided is a tire comprising a tread part composed of two or more layers and a sidewall part, wherein the tread part composed of two or more layers comprises at least a tread first layer on the outermost side in a tire radial direction and a tread inner layer inside in the tire radial direction, wherein the end of the tread inner layer extends to the sidewall part, the tread inner layer being arranged inside in a tire width direction with respect to a sidewall in the sidewall part, wherein a grounding surface of the tread first layer has two or more circumferential grooves extending continuously in a tire circumferential direction, land parts partitioned by the circumferential grooves, the land parts including a pair of shoulder land parts partitioned by two circumferential grooves located at both ends in the tire width direction and center land parts located between the pair of shoulder land parts, and width direction grooves or width direction grooves and sipes, wherein, where a total area of the land parts is defined as Sr and a total area of the center land parts is defined as Sce, Sr and See satisfy the following inequality (1), and wherein, where a loss tangent at 30°C of the rubber composition of the tread inner layer is defined as 30°C tan δ_BT and a loss tangent at 30°C of the rubber composition of the sidewall in the sidewall part is defined as 30°C tan δ_SW, 30°C tan δ_BT and 30°C tan δ_SW satisfy the following inequality (2). 0.35≤Sce/Sr≤0.80,and30°CtanδBT/30°CtanδSW<1

Anmelder

Firma

Sumitomo Rubber Industries, Ltd.

Land

🇯🇵 Japan

Fachgebiete