A tyre comprising a tread portion having a designated mounting direction to a vehicle, the tread portion comprising: a first tread edge located inwardly of a vehicle when being mounted to the vehicle; a second tread edge located outwardly of a vehicle when being mounted to the vehicle; circumferentially and continuously extending main grooves arranged between the first tread edge and the second tread edge, the main grooves comprising a first shoulder main groove arranged between the first tread edge and a tyre equator, a second shoulder main groove arranged between the second tread edge and the tyre equator, and at least one crown main groove arranged between the first shoulder main groove and the second shoulder main groove; and land portions divided by the main grooves, the land portions comprising a first middle land portion defined between the first shoulder main groove and the at least one crown main groove, a second middle land portion defined between the second shoulder main groove and the at least one crown main groove, a first shoulder land portion defined between the first shoulder main groove and the first tread edge, and a second shoulder land portion defined between the second shoulder main groove and the second tread edge, wherein the first middle land portion is provided with first middle lateral grooves extending from the first shoulder main groove and terminating within the first middle land portion, wherein the second middle land portion is provided with second middle lateral grooves extending from the at least one crown main groove and terminating within the second middle land portion, wherein the first shoulder land portion is provided with first shoulder lateral grooves extending in a tyre axial direction, wherein the second shoulder land portion is provided with second shoulder lateral grooves extending in the tyre axial direction, wherein the first middle lateral grooves and the second middle lateral grooves are inclined in a first direction with respect to the tyre axial direction, and wherein the first shoulder lateral grooves and the second shoulder lateral grooves are inclined in a second direction opposite to the first direction with respect to the tyre axial direction, wherein the tread portion is configured as a four-rib pattern which has four land portions and three main grooves, characterized in that lengths in the tyre axial direction of the second middle lateral grooves are smaller than lengths in the tyre axial direction of the first middle lateral grooves. a first tread edge located inwardly of a vehicle when being mounted to the vehicle; a second tread edge located outwardly of a vehicle when being mounted to the vehicle; circumferentially and continuously extending main grooves arranged between the first tread edge and the second tread edge, the main grooves comprising a first shoulder main groove arranged between the first tread edge and a tyre equator, a second shoulder main groove arranged between the second tread edge and the tyre equator, and at least one crown main groove arranged between the first shoulder main groove and the second shoulder main groove; and land portions divided by the main grooves, the land portions comprising a first middle land portion defined between the first shoulder main groove and the at least one crown main groove, a second middle land portion defined between the second shoulder main groove and the at least one crown main groove, a first shoulder land portion defined between the first shoulder main groove and the first tread edge, and a second shoulder land portion defined between the second shoulder main groove and the second tread edge, wherein the first middle land portion is provided with first middle lateral grooves extending from the first shoulder main groove and terminating within the first middle land portion, wherein the second middle land portion is provided with second middle lateral grooves extending from the at least one crown main groove and terminating within the second middle land portion, wherein the first shoulder land portion is provided with first shoulder lateral grooves extending in a tyre axial direction, wherein the second shoulder land portion is provided with second shoulder lateral grooves extending in the tyre axial direction, wherein the first middle lateral grooves and the second middle lateral grooves are inclined in a first direction with respect to the tyre axial direction, and wherein the first shoulder lateral grooves and the second shoulder lateral grooves are inclined in a second direction opposite to the first direction with respect to the tyre axial direction,