Motorcycle tire

A motorcycle tire comprising a tread surface having a shape projecting radially outward, wherein

• the tread surface includes a center portion including an equator, and a pair of shoulder portions including ends of the tread surface, respectively,
• a zone from the equator to each end of the tread surface, of a contour line of the tread surface, is divided into five equal sections, whereby the contour line is divided into ten parts,
• among the ten parts, two parts including the equator are each represented by an arc, and two parts including the ends of the tread surface, respectively, are each represented by an arc,
• each of three parts located between each part including the equator and each part including the end of the tread surface is represented by an arc or a straight line,
• a degree of curvature of the center portion is represented by an average of radii of the arcs that represent the two parts including the equator, respectively,
• a degree of curvature of each shoulder portion is represented by a radius of an arc having a larger radius, out of an arc that represents a part including a first end of the tread surface and an arc that represents a part including a second end of the tread surface,
• the degree of curvature of the shoulder portion is higher than the degree of curvature of the center portion,
• a ratio of the degree of curvature of the shoulder portion to a width of the tread surface is not less than 50%, and
• a ratio of the degree of curvature of the center portion to the width of the tread surface is not greater than 70%.