Pneumatic tire for motorcycle having center, intermediate and shoulder rubber

A pneumatic tire for motorcycle, comprising:

• a tread portion containing tread rubber having a layered structure including at least one layer;
• a pair of sidewall portions extending on the inner side in the radial direction and provided continuous with respective side portions of the tread portion;
• and
• bead portions provided continuous with the inner peripheral sides of the respective sidewalls,
• wherein a ground contact region of the tread portion is constituted of five regions consisting of:
• a center region including the tire equatorial plane;
• a pair of shoulder regions including ground contact ends of the tread;
• and a pair of intermediate regions located between the center region and the respective shoulder regions,
• 100% modulus of a portion forming at least a ground contact surface of intermediate tread rubber provided across the entire part of each intermediate region is set larger than each of 100% modulus of a portion forming at least a ground contact surface of center tread rubber provided across the entire part of the center region and 100% modulus of a portion forming at least a ground contact surface of shoulder tread rubber provided across the entire part of each shoulder region, and
• a negative ratio in the ground contact region of the tread is set so as to gradually increase from the respective shoulder regions toward the center region, and
• the negative ratios of the center region, each intermediate region and each shoulder region are set in the ranges of 6-12%, 3-9% and 1-7%, respectively,
• wherein 100% modulus of the center tread rubber is set larger than 100% modulus of the shoulder tread rubber.