| 摘要 |
PURPOSE:To improve drivability scacely free from a puncture of a tire by reinforcing a tire on both side with a rubber which has higher stiffness and an independant property of withstanding a wheel weight. CONSTITUTION:A symmetrical tire is reinforced on both sides with an elastic material of a rubber to provide higher stiffness and independant property of withstanding a wheel weight. The material keeps JIS stiffness 70 deg., tension stres(Mod25) 10kg/cm<2> or more after a 24-hour aging test under the inert circumstance at 140 deg.C + or -1 deg.C, and impact resilience 65% or more by use of a Dunlop trypsometer. Durability against a puncture can be increased. |
