Tyre

A tyre comprising:

• a tread portion being provided with a middle land portion, a shoulder land portion,
• and a shoulder circumferential groove extending between the middle land portion and the shoulder land portion, wherein
• the middle land portion is provided with two or more full-opened middle sipes,
• the middle sipes are inclined with respect to a tyre axial direction,
• the middle sipes each have two opposite sipe-edge portions provided with chamfer portions,
• in each chamfer portion of each middle sipe, chamfer widths at both ends in a sipe longitudinal direction of the middle sipe are larger than a chamfer width of a central portion in the sipe longitudinal direction of the middle sipe,
• each chamfer portion of each middle sipe increases in chamfer width from the central portion to the both ends continuously,
• in each middle sipe, chamfer depths at the both ends of the middle sipe are greater than a chamfer depth of the central portion of the middle sipe, and a depth of the middle sipe at an innermost end thereof in the tyre axial direction is greater than a depth of the middle sipe at an outermost end thereof in the tyre axial direction, and
• the shoulder land portion is provided with two or more shoulder sipes that are inclined in a same direction as the middle sipes with respect to the tyre axial direction.

A tyre comprising:

• a tread portion being provided with a crown land portion, a middle land portion, a shoulder land portion, a crown circumferential groove extending between the crown land portion and the middle land portion, and a shoulder circumferential groove extending between the middle land portion and the shoulder land portion, wherein
• 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 middle land portion is provided with two or more semi-opened first middle sipes communicated with the crown circumferential groove, and two or more semi-opened second middle sipes communicated with the shoulder circumferential groove, and
• the first middle sipes each have two opposite sipe-edge portions provided with chamfer portions,
• the first middle sipes are arranged so as not to overlap the crown sipes in a tyre circumferential direction,
• the second middle sipes each have two opposite sipe-edge portions where no chamfer portion is provided, and
• the second middle sipes are arranged so as to overlap the crown sipes in the tyre circumferential direction.