Solid Heavy Duty Construction Constructed from durable material, this bike supports users up to 350 lbs, accommodating a wide range of training intensities and goals. The Air Bikes steel cage protects and keeps the resistance wheel intact while the heavy-duty frame construction keeps the bike durable during those vigorous workout sessions. Belt and Chain Drive System The fan bike creates resistance using the belt-drive, which keeps the bike quiet/low maintenance. Pedals are connected to the chain drive system giving you the feeling of an outdoor bike. This indoor bike features an air resistance system that utilizes a fan instead of a weighted flywheel that increases resistance as you pedal faster. It also produces cool air to enhance comfort and endurance while you work out. The harder you push,the more resistance youll feel. Place your feet on the bike pegs to work the upper body. Experience smooth movement on the air bike with a complete Cross-Fit Workout.