Commercial magnetic upright bike for fitness exercises. Main characteristics: 1) resistence: 16-step tension control; 2) power: self- generating power system; 3) flywheel: high power magnet; 4) display: regular LCD with backlight computer; 5) control: hand-pulse system for heart rate display; 6) display functions: time, speed ,Rpm, distance, watt, calories. Seat can be adjusted bach and ahead, up and down smoothly and noiseless with all the moving parts using stainless and electroplate material. Big and strong leg ahead and back of the bike makes machine stand stable and looks luxuriously.