The Bolt M-Pro Spin Bike is our commercial spin bike with a magnetic wheel. The magnetic wheel makes for less noise because it uses magnets to effect the wheel instead of pads, so they do not grind up against the wheel. Great for big gyms that have a lot of spin bikes and other machines. This bike is durable and easy to use. It comes with a 20kg solid steel flywheel. Spin bikes offer many benefits such as weight-loss and strength building and one of the best cardio workouts.