Belt formula bicycle and belt pulley thereof

The utility model discloses a belt formula bicycle and belt pulley thereof, including base ring and circumference setting a plurality of dogtooth on the circumference lateral wall outside the base ring, the interior circumference lateral wall threaded connection of base ring has the go -between, the go -between lateral wall is provided with the first retaining ring that offsets with one of them end wall of base ring, the one end that first retaining ring was kept away from to the base ring is provided with the second retaining ring. Its technical scheme main points are behind first retaining ring deformation and damage, unscrew base ring and go -between screw thread, then change the go -between, behind second retaining ring deformation and damage, unscrew base ring and go -between screw thread, then change the base ring, since need not to whole belt formula for the bicycle belt pulley change, so effectively reduce cost of maintenance. 本实用新型公开了种皮带式自行车及其皮带轮，包括基环和周向设置在基环外圆周侧壁上的若干个凸齿，所述基环的内圆周侧壁螺纹连接有连接环，所述连接环外侧壁设置