Pneumatic tire

A pneumatic tire comprising:

• a tread portion having a pair of tread edges and being provided with only three continuously extending circumferential grooves to separate a plurality of land portions, wherein the tread portion comprises a designated install direction to a vehicle such that the tread edges comprise an outboard tread edge and an inboard tread edge;
• the circumferential grooves consisting of a first shoulder main groove, a second shoulder main groove and a crown main groove disposed between the first shoulder main groove and the second shoulder main groove;
• the land portions comprising a pair of shoulder portions each extending to the tread edges and disposed axially outward of each of the first and second shoulder main grooves, a first crown portion forming an entire region between the crown main groove and the first shoulder main groove, and a second crown portion forming an entire region between the crown main groove and the second shoulder main groove, wherein the first crown portion is disposed on the outboard tread edge side and the second crown portion is disposed on the inboard tread edge side;
• the first crown portion being provided with a plurality of first crown sipes having a width of less than 2 mm, but the first crown portion being not provided with any grooves having a width equal to or more than 2 mm;
• the second crown portion being provided with a plurality of second crown sipes having a width of less than 2 mm, but the second crown portion being not provided with any grooves having a width equal to or more than 2 mm;
• each of the first crown sipes extending from the crown main groove to the first shoulder main groove with a first inclination direction with respect to an axial direction of the tire;
• and
• each of the second crown sipes extending from the crown main groove to the second shoulder main groove with the first inclination direction with respect to an axial direction of the tire, wherein
• each of the first crown sipes and the second crown sipes extend in a curved shape, and each of the first crown sipes has a radius of curvature that is greater than the radius of curvature of each of the second crown sipes.