| 摘要 |
<p>PURPOSE:To reduce bending deformation and heat generation in a bead part, suppress damages of chafing or the like, and improve the bead durability in the basic design where the outside rubber is divided into a chafer rubber and a side wall rubber which are provided with specified moduli respectively. CONSTITUTION:A tire is provided with at least an outside rubber 17 forming the outside surface of a tire from the bottom side surface of a bead part to a side well part. The outside rubber 17 is divided into a chafer rubber 20 including a region (Y) which is brought into contact with a flange RA of a regular rim (R) in the 200% load condition, and a side wall rubber 21 located above the chafer rubber. The respective 100% module MP, MA, MC, MS of the side packing rubber 15, the bead apex rubber 9, the chafer rubber 20 and the side wall rubber 21 are set to 53-95kg/cm<2>, 78-120kg/cm<2>, 40-70kg/cm<2>, 10-45kg/cm<2>, in order. The respective moduli are set to satisfy the relationship MS<MC<MP<MA.</p> |
