Sunny Health & Fitness Upright Exercise Bike with Electromagnetic Resistance, Programmable Monitor and Pulse Rate… $189.98 Make sure this fits by entering your model number. Belt-drive: when you pedal, you’ll push against the speedy 6. 6-Pound flywheel with the belt-drive mechanism. Even when the exercise bike is not plugged in, you’ll still be able to perform in-home cycling workouts. Pulse sensors: to keep tabs on your heart RATE, grab onto the Pulse sensors as you exercise on the magnetic Upright bike. The heart RATE data can be used to personalize the pre-installed heart rate-driven workout programs.