A tyre comprising: a tread portion comprising a first land portion having a circumferentially extending first edge and a circumferentially extending second edge on its ground contacting surface; the first land portion being provided with first lateral grooves extending from the first edge and terminating within the first land portion , second lateral grooves extending from the second edge and terminating within the first land portion , and first sipes ; and each first sipe extending from a first end thereof opened at the second edge toward the first edge , and turning in a direction within the first land portion to extend to a second end thereof opened at the second edge at a different location from the first end , characterized in that the tread portion has a designated mounting direction to a vehicle, the first land portion is an outboard middle land portion located on an outboard side of a vehicle upon being mounted onto a vehicle and arranged between a tyre equator (C) and an outboard tread edge (To) and the first edge is located on the tyre equator (C) side, the tread portion is further provided with an inboard middle land portion , the outboard middle land portion is defined between an outboard crown longitudinal groove and an outboard shoulder longitudinal groove , and the inboard middle land portion is defined between an inboard crown longitudinal groove and an inboard shoulder longitudinal groove , the inboard middle land portion is provided with inboard middle lateral grooves traversing the inboard middle land portion completely and with inboard sipes extending from a first inboard end opened at the inboard shoulder longitudinal groove toward the inboard crown longitudinal groove and then turning back to a second inboard end opened at the inboard shoulder longitudinal groove at a different location from the first inboard end without reaching the inboard crown longitudinal groove . a tread portion comprising a first land portion having a circumferentially extending first edge and a circumferentially extending second edge on its ground contacting surface; the first land portion being provided with first lateral grooves extending from the first edge and terminating within the first land portion , second lateral grooves extending from the second edge and terminating within the first land portion , and first sipes ; and each first sipe extending from a first end thereof opened at the second edge toward the first edge , and turning in a direction within the first land portion to extend to a second end thereof opened at the second edge at a different location from the first end , characterized in that the tread portion has a designated mounting direction to a vehicle, the first land portion is an outboard middle land portion located on an outboard side of a vehicle upon being mounted onto a vehicle and arranged between a tyre equator (C) and an outboard tread edge (To) and the first edge is located on the tyre equator (C) side, the tread portion is further provided with an inboard middle land portion , the outboard middle land portion is defined between an outboard crown longitudinal groove and an outboard shoulder longitudinal groove , and the inboard middle land portion is defined between an inboard crown longitudinal groove and an inboard shoulder longitudinal groove , the inboard middle land portion is provided with inboard middle lateral grooves traversing the inboard middle land portion completely and with inboard sipes extending from a first inboard end opened at the inboard shoulder longitudinal groove toward the inboard crown longitudinal groove and then turning back to a second inboard end opened at the inboard shoulder longitudinal groove at a different location from the first inboard end without reaching the inboard crown longitudinal groove . <EOS>