Magnetic bikes create a powerful resistance with the help of the flywheel and two strong magnets. The magnets are positioned on either side of the flywheel but are never allowed to make contact with it. As one rides the bike, the rotation of the flywheel disrupts the magnetic field. This attraction creates resistance which makes it more difficult to peddle. When a more elevated level of resistance is needed, a knob is turned to bring the magnets closer to the flywheel and vice versa.
These noiseless bikes are remarkably advantageous to own, as they require no maintenance. Since the magnets do not come in direct contact with the flywheel, there is no mechanical wear and tear which otherwise would require regular brake pad replacement. Moreover, it empowers the rider to customize the workout by allowing them to precisely adjust the level of resistance.
So Magnetic resistance exercise bikes are best and dominate the modern marketplace.