Title:
TIRE
Document Type and Number:
Japanese Patent JP2022029764
Kind Code:
A
Abstract:
To provide a tire of which post-abrasion wet stability performance and grip performance on snow are improved in a well-balanced way.SOLUTION: The tire includes a tread which comprises at least a first rubber layer 6 constituting a tread surface 3, a second rubber layer 7 adjacent to a radial inside of the first rubber layer, and a third rubber layer 8 adjacent to a radial inside of the second rubber layer. A complex elastic modulus at 30°C of the second rubber layer is lower than complex elastic moduli at 30°C of the first rubber layer and the third rubber layer, and tanδ at 30°C of the second rubber layer is higher than tanδ at 30°C of the first rubber layer and the third rubber layer, and the tread has land parts 2 partitioned by a plurality of circumferential grooves 1 continuously extending in a circumferential direction of the tire, and the deepest part of a groove bottom of one circumferential groove is formed so as to be located more inside in a radial direction of the tire than the outermost part of the second rubber layer in land parts adjacent to this circumferential groove.SELECTED DRAWING: Figure 3
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Inventors:
WATANABE KENYA
Application Number:
JP2020133243A
Publication Date:
February 18, 2022
Filing Date:
August 05, 2020
Export Citation:
Assignee:
SUMITOMO RUBBER IND
International Classes:
B60C11/00; B60C1/00; B60C11/03; B60C11/12; B60C11/13
Attorney, Agent or Firm:
Asahina Patent Office