1. A bicycle comprising a frame, a entrance wheel along with a rear wheel rotatably mounted to the frame, a major transmission system including a crank axle rotatably mounted around the body, two cranks mounted on reverse ends with the crank axle, two pedals mounted on the cranks, a front https://alexisswzbb.spintheblog.com/22087151/helping-the-others-realize-the-advantages-of-yongmart