| 摘要 |
PURPOSE: To mitigate the impact transferred to a driver from a tire and improve the riding comfortableness when the driver travels a rugged place having stones on a bicycle or descends a stepped place. CONSTITUTION: The first hollow section 3a having a width equal to or slightly larger than the width in the peripheral direction of the rim section 2 of a reinforcement section 6 is formed in the peripheral groove bottom section 3 of the connection portion between the reinforcement section 6 reinforcing the connection portion between a spoke section 5 and the rim section 2 and the peripheral groove section 3 of the rim section 2. |
