| 摘要 |
PURPOSE:To ameliorate in riding comfortability, prevent vibration noise, and improve its life, in such a way that venthole spaces are provided inside the rubber of a tire, and spikes are formed retractile with pressure adjustment in the venthole spaces. CONSTITUTION:Venthole spaces 2 are provided in the rubber 1 of a tire, and valves are provided at the venthole spaces 2. The pressure is increased in the venthole spaces 2 through the valves. Thus, the spikes 4 are protruded with increase of the pressure, thus the tire works as a spike tire, and when it is decompressed, the spikes 4 are retracted through force of resilient bodies 6, and the tire is returned to a regular tire. By such a constitution, as the spikes 4 are in function only when they are needed, vibration noise is reduced, riding comfortablity is ameliorated, and wear on the spikes can be reduced. |
