Patent ID: 11878554
Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A tyre comprising:
a tread portion having a designated mounting direction to a vehicle, the tread portion being provided with a crown land portion, an outboard middle land portion and an outboard shoulder land portion which are located outboard of a vehicle when the tyre is mounted to the vehicle, an outboard crown circumferential groove extending between the crown land portion and the outboard middle land portion, an outboard shoulder circumferential groove extending between the outboard middle land portion and the outboard shoulder land portion, an inboard middle land portion and an inboard shoulder land portion which are located inboard of the vehicle when the tyre is mounted to the vehicle, an inboard crown circumferential groove extending between the crown land portion and the inboard middle land portion, and an inboard shoulder circumferential groove extending between the inboard middle land portion and the inboard shoulder land portion, wherein
the outboard middle land portion is provided with two or more full-opened outboard middle sipes,
the outboard middle sipes are inclined with respect to a tyre axial direction,
the outboard middle sipes each have two opposite sipe-edge portions provided with chamfer portions,
in each chamfer portion of each outboard middle sipe, chamfer widths at both ends in a sipe longitudinal direction of the outboard middle sipe are larger than a chamfer width of a central portion in the sipe longitudinal direction of the outboard middle sipe,
the outboard shoulder land portion is provided with two or more outboard shoulder sipes,
the outboard shoulder sipes are inclined in a same direction as the outboard middle sipes with respect to the tyre axial direction,
the crown land portion is provided with two or more semi-opened crown sipes,
the crown sipes each have two opposite sipe-edge portions provided with chamfer portions,
the inboard middle land portion is provided with two or more semi-opened first inboard middle sipes communicated with the inboard crown circumferential groove, and two or more semi-opened second inboard middle sipes communicated with the inboard shoulder circumferential groove,
the first inboard middle sipes each have two opposite sipe-edge portions provided with chamfer portions, and
the second inboard middle sipes each have two opposite sipe-edge portions where no chamfer portion is provided.