Abstract: A flywheel device for an exercise bike includes a frame body, a pedal unit and a reinforced glass flywheel. The pedal unit and the reinforced glass flywheel are assembled to the frame body. The frame body has a driving member connected with the pedal unit and the reinforced glass flywheel. The pedal unit and the reinforced glass flywheel are rotated spontaneously via the driving member. A driven device is pivotally mounted on a center portion of the reinforced glass flywheel. Two ends of the driven device are positioned on the frame body. One end of the driven device assembled with the driving member.

Abstract: A multi-mode exercise device includes a main body having two supporting arm assemblies symmetrically mounted on two sides thereof. Each supporting arm assembly has four arms. The four arms of each supporting assembly are pivotally connected with each other via five pivot joints. The main body further has a guiding wheel set, a rotating disc and two connecting rods. Therefore, a user could step on pedals along vertical direction, parallel direction or circular direction selectively.