| 摘要 |
PROBLEM TO BE SOLVED: To provide a tire combining ride comfort and steering stability at high level. SOLUTION: A reinforcing layer 20 positioned on an inner peripheral side of a carcass 10 inside of a side wall 6 is provided. The carcass 10 has a radial structure. A bead 8 is equipped with a core 26, and an apex 28 extending outward in a radial direction from the core. A ratio (Sa/Sc) of a cross section area Sa of the apex 28 to a cross section Sc of the core 26 is 0.5-1.5. The hardness of the reinforcing layer 20 is 85-95. The thickness of the reinforcing layer 20 is 1-4 mm. A ratio (H1/Ht) of the height H1 of the reinforcing layer 20 to the height Ht of the tire 2 is 0.5-0.8. Preferably, the thickness of the reinforcing layer 20 of the tire 2 is not less than 2 mm. Preferably, a radial direction distance from an end on the inside in the radial direction of the reinforcing layer 20 to a bead tow tip end is not less than 10 mm. COPYRIGHT: (C)2009,JPO&INPIT |
