PUNCTURE PREVENTION TIRE FOR TRAVELING A VEHICLE UNTIL THE TIRE IS REPLACED BY GRADUALLY EXHAUSTING A LITTLE THE AIR CONTAINED IN THE TIRE IN ABNORMAL WEAR OF THE TIRE

摘要

PURPOSE: A puncture prevention tire is provided to prevent a large puncture of the tire caused by abnormal wear by making a small puncture on the tire when a no-tube tire is worn out at the predetermined depth. CONSTITUTION: In a tire(T) of a no-tube vehicle that is filled with proper pneumatic pressure, a puncture prevention tire is composed of a cone-shaped groove unit, which is formed from an inside(10) of the tire to a limitation display unit(20). When the tire is worn in frictionizing with the ground to the limitation display unit, the air in the tire is exhausted gradually through the cone-shaped groove unit. And then the vehicle inclines to one side and accordingly a driver recognizes automatically the tire replacing time.