The Impulse PS450 Spinning Bike, is a high end quality commercial bike.The PS450 has designed its flywheel to be at the rear, which gives you the experience of riding a real bike. Being rear mounted, it protects the flywheel from sweat and water while you exercise. The PS450 features a chrome plated flywheel, which creates a secure, quiet and vibration-free workout, as well as an adjustable magnetic resistance that simulates actual riding,with 20 levels of resistance. with Minimal maintenance needed, as it is belt driven. The bike is constructed of coated steel and aluminum.The padded seats are fully adjustable, as are the multi-position handlebars.