| 摘要 |
<p>PURPOSE:To reduce the weight of a tire without damaging the durability by forming the side wall rubber by a foam rubber part located in the prescribed range from the bead base line and the buttress rubber. CONSTITUTION:The side wall rubber 14 is formed by a buttress rubber part 19 forming a buttress part 17 outside in the radial direction of a side wall part 4 and a foam rubber part 15. This foam rubber part 15 is formed by dispersing independent foam in a rubber base body which is as high as 1.5-3.0 times the rim flange height HF and rises from the outer end height HC of a clinch apex 13 from the bead base line, and where the upper end height HT is 70-85% of the height of the tire section. Thus, the weight of the tire can be reduced without detriorating the performance such as the durability.</p> |
