Patent ID: 11904639
Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A tire comprising:
a tread portion having a designated rotation direction, the tread portion comprising at least one block row comprising a plurality of blocks arranged in a tire circumferential direction and a plurality of lateral grooves arranged between the plurality of blocks,
each of the plurality of blocks comprising a block tread surface, a first block sidewall surface located on a leading side in the rotation direction of the block, and a leading-side corner portion between the block tread surface and the first block sidewall surface,, wherein
the leading-side corner portion comprises a first portion and a second portion each extending in a tire axial direction,
the first portion is smaller in angle (γ) than the second portion, where the angle (γ) is an angle between a normal (n) of the block tread surface and a virtual straight-line (m) in which the block sidewall surface connected to the block tread surface is expanded outwardly in a tire radial direction,
a chamfer portion is formed on the first portion,
a chamfer portion is formed on the second portion,
the chamfer portion of the first portion is smaller in chamfer width and chamfer height than the chamfer portion of the second portion,
in a plan view of each block, an angle θ1 of the chamfer portion of the first portion with respect to the tire circumferential direction is larger than an angle θ2 of the chamfer portion of the second portion with respect to the tire circumferential direction, and
each lateral groove has a groove width (A) at the first portion that is larger than a groove width (B) at the second portion.