Product details:

The AssaultBike Pro X introduces several new features to the original Pro model, including an updated, whisper quiet drivetrain and an extended front stabilizer for a more secure platform. Like the other exercise bikes produced by AssaultFitness, the Pro X utilizes air resistance and modern engineering to custom-scale automatically to how hard you want to work; no matter your size, experience, or skill level. The physics are simple: the harder you pedal, the greater the resistance.