Title:
RUN-FLAT TIRE
Document Type and Number:
Japanese Patent JP2022157679
Kind Code:
A
Abstract:
To provide a run-flat tire which suppresses lowering of riding comfort while securing run-flat durability.SOLUTION: One part 6b of a crescent-shaped side reinforcement rubber 6 is a low elastic part lower than the other part 6a; the low elastic part is located in a tire radial direction area which, in a reference state, is 50% or more and 80% or less of a tire cross section height from a bead base line, and an elastic modulus thereof is 80% or less of the other part; on a tire width direction cross section in the reference state, as specifying a thickness of the low elastic part, in a perpendicular direction from a carcass 4 down to a tire inner surface, which becomes the largest, the maximum thickness, as t1, and specifying a thickness of the other part in the perpendicular direction as t2, a ratio t1/t2 is 0.2 or more and 3 or less; a tire maximum width in the reference state is a center value or more of the tire maximum width specified according to the standard and an upper limit or less; and a tire maximum width position in the reference state is located on a tire radial direction inner side from a separated position which is 50% of the tire cross section height from the bead base line to a tire radial direction outer side.SELECTED DRAWING: Figure 1
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Inventors:
MUKOUYAMA TOMONAO
IWATANI TAKESHI
IWATANI TAKESHI
Application Number:
JP2021062037A
Publication Date:
October 14, 2022
Filing Date:
March 31, 2021
Export Citation:
Assignee:
BRIDGESTONE CORP
International Classes:
B60C17/00; B60C5/14
Attorney, Agent or Firm:
Kenji Sugimura
Mitsutsugu Sugimura
Yasuyuki Komatsu
Yusuke Yamaguchi
Mitsutsugu Sugimura
Yasuyuki Komatsu
Yusuke Yamaguchi