| 摘要 |
PURPOSE:To increase the lateral rigidity of shoulder rids and make the quality of anti-tear at the shoulder rib portions of a tread excellent. CONSTITUTION:In the case of a radial tire having a tread 1 of a rib pattern, when the width of a shoulder rib is made to be W (cm) and the depth of a tread groove is made to be D (cm) and the rate of elasticity (300% modulus M300) of tread rubber is made to be A (kgf/cm2), tread constitution which is formed with each shoulder rib width that is 140<=A<200, 1.55>D>1.0 and also satisfies as expression (W/D)<3>XA<=2150, is made. |
