| 摘要 |
PURPOSE:To prevent spike dust pollution from occurring, by making a tire bottom part wider and thicker to some extent, while driving a spike pin in the circumference of a circle where it is not made contact with the ground, and constituting a distance between the pin and a road surface so as to be adjustable with inflation pressure. CONSTITUTION:A pin 2 for a spiked tire is set up in a position where it is not made contact with a road surface 6 at the time of ordinary driving, while a tire bottom part 4 is made wider and thicker to some extent. And, when this tire is made to function as a spiked tire, air pressure is reduced to some extent whereby a spike pin 1 is made so as to come into contact with the road surface 6. And, if the air pressure is increased and the pin 1 is made to come off the road surface, it comes to an ordinary tire. With this constitution, tire change is no longer required and, what is more, spike dust pollution in time of the spiked tire unrequired is prevented from occurring. |
