| 摘要 |
PROBLEM TO BE SOLVED: To suppress temperature rise in both of near tire equator and neat a belt layer outer end. SOLUTION: A tread surface is divided into inner/outer rib-shaped land parts R1, R2, R2 by three vertical grooves G. In a ground contacting state loading a normal load, assuming that a total sum of a ground contacting load respectively loaded on a tire equator side half range R1c and a ground contacting end side half range R1e in the inner rib-shaped land part R1 are P1c, P1e, and assuming that a total sum of a tire equator side half range 2c and a ground contacting end side half range R2e in the outer rib-shaped land part portion R2 are P1c, P1e, each ratio is regulated as follows, P1e/P1c=0.8 to 1.0, P2c/P1e=0.5 to 0.8, P2e/P2c=0.9 to 1.1, and P2e/P1c=0.5 to 0.8. COPYRIGHT: (C)2005,JPO&NCIPI |
