TYRE

A tyre includes a tread portion 2 including a first cap rubber layer 11 forming a ground contact surface 2s and having a loss tangent tan δ1, and a second cap rubber layer 12 disposed inwardly in a tyre radial direction of the first cap rubber layer 11 and having a loss tangent tan δ2, the loss tang...

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Bibliographic Details
Main Authors ISHIGAKI, Yuichi, TSUZUKI, Yuka
Format Patent
LanguageEnglish
French
German
Published 28.12.2022
Subjects
DEVICES OR ARRANGEMENTS RELATED TO TYRES
PERFORMING OPERATIONS
REPAIRING, OR CONNECTING VALVES TO, INFLATABLE ELASTIC BODIESIN GENERAL
TRANSPORTING
TYRE CHANGING OR REPAIRING
TYRE INFLATION
VEHICLE TYRES
VEHICLES IN GENERAL
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Summary:A tyre includes a tread portion 2 including a first cap rubber layer 11 forming a ground contact surface 2s and having a loss tangent tan δ1, and a second cap rubber layer 12 disposed inwardly in a tyre radial direction of the first cap rubber layer 11 and having a loss tangent tan δ2, the loss tangent tan δ2 being greater than the loss tangent tan δ1. The tread portion 2 is provided with a plurality of sipes 15 opening to the ground contact surface 2s. The plurality of sipes 15, at least partially, extends inwardly in a tyre radial direction from the ground contact surface 2s to a location beyond a boundary16 between the first cap rubber layer 11 and the second cap rubber layer 12, and a maximum length L2 of the plurality of sipes 15 in the second cap rubber layer 12 is smaller than a length L1 of the plurality of sipes 15 at the ground contact surface2s.
Bibliography:Application Number: EP20220176946