Title:
RUN-FLAT TIRE
Document Type and Number:
Japanese Patent JP2022157662
Kind Code:
A
Abstract:
To provide a run-flat tire that suppresses increase of rolling resistance while ensuring run-flat durability.SOLUTION: A run-flat tire according to the present invention includes a tread part, a sidewall part, a bead part, a side reinforcing rubber, a carcass, and a belt, and has an inner liner arranged on an inner surface of the tire, and an inner-layer rubber arranged between the side reinforcing rubber and the inner liner. An outer end part of the inner liner in a tire width direction and an outer end part of the inner-layer rubber in a tire radial direction are arranged to face each other, or the outer end part of the inner liner in the tire width direction and the outer end part of the inner-layer rubber in the tire radial direction overlap with each other, with an overlap width of 30 mm or less, satisfying W2≤W1≤W2+20(mm) in a reference state. A loss tangent tan δ1 of the inner-layer rubber is 80% or less of a loss tangent tan δ2 of the inner liner.SELECTED DRAWING: Figure 1
Inventors:
MUKOUYAMA TOMONAO
Application Number:
JP2021062013A
Publication Date:
October 14, 2022
Filing Date:
March 31, 2021
Export Citation:
Assignee:
BRIDGESTONE CORP
International Classes:
B60C17/00; B60C5/14; B60C9/18
Attorney, Agent or Firm:
Kenji Sugimura
Mitsutsugu Sugimura
Yasuyuki Komatsu
Yusuke Yamaguchi
Mitsutsugu Sugimura
Yasuyuki Komatsu
Yusuke Yamaguchi
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