A pneumatic tire comprising: a tread portion comprising a contact patch which occurs when the tire is mounted on a standard wheel rim with a standard pressure and loaded with a certain tire load at zero camber angle, the tread portion being further provided with a belt layer, the belt layer comprising an inner belt ply and an outer belt ply in a tire radial direction, and an axial width of the outer belt ply being equal to or more than 60% of a tread width; and the tread portion further comprising a circumferentially and continuously extending crown main groove arranged on a tire equator and a circumferentially and continuously extending shoulder main groove arranged between the crown main groove and a tread edge to define a middle land portion between the crown main groove and the shoulder main groove, and a shoulder land portion between the shoulder main groove and the tread edge, and wherein the tread portion, in a tire meridian cross-sectional view, comprises a profile comprising a plurality of circular arcs having different radii of curvature, the profile comprising a crown circular arc straddling the tire equator and protruding radially outwardly with a first radius of curvature TR1, a middle circular arc connected to the crown circular arc and protruding radially outwardly with a second radius of curvature TR2, and a shoulder circular arc connected to the middle circular arc and protruding radially outwardly with a third radius of curvature TR3, the middle circular arc being connected to the crown circular arc at a first connecting portion located on the middle land portion, and the shoulder circular arc being connected to the middle circular arc at a second connecting portion located on the shoulder land portion, characterised in that the contact patch, on a respective tire load, defines a ratio Lc/Ls of a crown contact circumferential length Lc at an axial center of the contact patch to a shoulder contact circumferential length Ls at an axial location of 80% of an axial maximum width of the contact patch, wherein the ratio Lc/Ls upon being loaded with 40% of a standard tire load is equal to or less than 125% of the ratio Lc/Ls upon being loaded with 70% of the standard tire load, wherein on the contact patch upon being loaded with 40% of the standard tire load, an axial contact width of the shoulder land portion being in a range of from 130% to 140% of an axial contact width of the middle land portion (11 A), and wherein the first connecting portion is located within 2 mm from an axial center of the middle land portion, and wherein the second connecting portion is located axially outwardly from an axially inner end of the shoulder land portion of from 5 to 10 mm. a tread portion comprising a contact patch which occurs when the tire is mounted on a standard wheel rim with a standard pressure and loaded with a certain tire load at zero camber angle, the tread portion being further provided with a belt layer, the belt layer comprising an inner belt ply and an outer belt ply in a tire radial direction, and an axial width of the outer belt ply being equal to or more than 60% of a tread width; and the tread portion further comprising a circumferentially and continuously extending crown main groove arranged on a tire equator and a circumferentially and continuously extending shoulder main groove arranged between the crown main groove and a tread edge to define a middle land portion between the crown main groove and the shoulder main groove, and a shoulder land portion between the shoulder main groove and the tread edge, and wherein the tread portion, in a tire meridian cross-sectional view, comprises a profile comprising a plurality of circular arcs having different radii of curvature, the profile comprising a crown circular arc straddling the tire equator and protruding radially outwardly with a first radius of curvature TR1, a middle circular arc connected to the crown circular arc and protruding radially outwardly with a second radius of curvature TR2, and a shoulder circular arc connected to the middle circular arc and protruding radially outwardly with a third radius of curvature TR3, the middle circular arc being connected to the crown circular arc at a first connecting portion located on the middle land portion, and the shoulder circular arc being connected to the middle circular arc at a second connecting portion located on the shoulder land portion, characterised in that the contact patch, on a respective tire load, defines a ratio Lc/Ls of a crown contact circumferential length Lc at an axial center of the contact patch to a shoulder contact circumferential length Ls at an axial location of 80% of an axial maximum width of the contact patch, wherein the ratio Lc/Ls upon being loaded with 40% of a standard tire load is equal to or less than 125% of the ratio Lc/Ls upon being loaded with 70% of the standard tire load, wherein on the contact patch upon being loaded with 40% of the standard tire load, an axial contact width of the shoulder land portion being in a range of from 130% to 140% of an axial contact width of the middle land portion (11 A), and wherein the first connecting portion is located within 2 mm from an axial center of the middle land portion, and wherein the second connecting portion is located axially outwardly from an axially inner end of the shoulder land portion of from 5 to 10 mm.