A tire comprising a tread portion having a first tread edge to be positioned inboard of a vehicle and a second tread edge to be positioned outboard of the vehicle, wherein the tread portion is provided with circumferential grooves extending continuously in the tire circumferential direction to axially divide the tread portion into land portions, the land portions include a crown land portion, a first middle land portion adjacent to the crown land portion on the first tread edge side thereof, and a second middle land portion adjacent to the crown land portion on the second tread edge side thereof, and in a meridian cross section of the tire under a normal state of the tire, the crown land portion, the first middle land portion and the second middle land portion respectively have a crown profile, a first middle profile and a second middle profile which protrude radially outwardly from respective reference tread profiles, wherein the reference tread profile of the first middle land portion and of the second middle land portion is a respective circular arc having a single radius and passing through three positions which are both edges of the ground contacting surface of the first middle land portion and of the second middle land portion, respectively, and the groove edge on the tire equator side of a circumferential groove axially inwardly adjacent to the first middle land portion and to the second middle land portion, respectively, wherein the reference tread profile of the crown land portion is a circular arc which is one having a radius not smaller than the other of two circular arcs which have a single radius and pass through both edges of the ground contacting surface of the crown land portion and a respective groove edge on the first tread edge side and on the second tread edge side, respectively, of a respective circumferential groove adjacent to the crown land portion on the first tread edge side and on the second tread edge side, respectively, and wherein a maximum protrusion amount of the first middle profile from the reference tread profile therefor is larger than a maximum protrusion amount of the crown profile from the reference tread profile therefor which is larger than a maximum protrusion amount of the second middle profile from the reference tread profile therefor, characterized in that the crown land portion is provided with crown lateral grooves, and each of arrangement pitches of the crown lateral grooves in the tire circumferential direction is set in a range from 60 % to 90 % of an axial width of the crown land portion. the tread portion is provided with circumferential grooves extending continuously in the tire circumferential direction to axially divide the tread portion into land portions, the land portions include a crown land portion, a first middle land portion adjacent to the crown land portion on the first tread edge side thereof, and a second middle land portion adjacent to the crown land portion on the second tread edge side thereof, and in a meridian cross section of the tire under a normal state of the tire, the crown land portion, the first middle land portion and the second middle land portion respectively have a crown profile, a first middle profile and a second middle profile which protrude radially outwardly from respective reference tread profiles, wherein the reference tread profile of the first middle land portion and of the second middle land portion is a respective circular arc having a single radius and passing through three positions which are both edges of the ground contacting surface of the first middle land portion and of the second middle land portion, respectively, and the groove edge on the tire equator side of a circumferential groove axially inwardly adjacent to the first middle land portion and to the second middle land portion, respectively, wherein the reference tread profile of the crown land portion is a circular arc which is one having a radius not smaller than the other of two circular arcs which have a single radius and pass through both edges of the ground contacting surface of the crown land portion and a respective groove edge on the first tread edge side and on the second tread edge side, respectively, of a respective circumferential groove adjacent to the crown land portion on the first tread edge side and on the second tread edge side, respectively, and wherein a maximum protrusion amount of the first middle profile from the reference tread profile therefor is larger than a maximum protrusion amount of the crown profile from the reference tread profile therefor which is larger than a maximum protrusion amount of the second middle profile from the reference tread profile therefor, a maximum protrusion amount of the first middle profile from the reference tread profile therefor is larger than a maximum protrusion amount of the crown profile from the reference tread profile therefor which is larger than a maximum protrusion amount of the second middle profile from the reference tread profile therefor, the crown land portion is provided with crown lateral grooves, and each of arrangement pitches of the crown lateral grooves in the tire circumferential direction is set in a range from 60 % to 90 % of an axial width of the crown land portion.