COMMERCIAL DELUXE SPIN BIKE.STEP THROUGH FRAME FOR EASY ACCESS.BELT DRIVEN MECHANISM FOR ULTRA SMOOTH OPERATION.EXTRA STRONG STABLE STEEL FRAME FOR THE MOST DEMANDING USERS COMPLETELY ADJUSTABLE SEAT, COMFORTABLE PEDALS FOR OPTIMUM ERGONOMIC2 WAY MOTION HEAVY DUTY 3 PCS. CRANK AND 20 KG. OF ROTATING..