Precor manufactures competitive models of upright and recumbent exercise bikes. Most Precor bikes feature magnetic resistance, a belt drive, 25 resistance levels, 6 to 8 pre-programmed workouts and races, a glossy LED display and a grip heart monitor. They also feature pedal straps, water bottle holders, and a three-phase generator on every model. Precor bikes can handle weights up to 350 lbs., making them perfect for anyone who wants to lose weight and exercise without impact to the knees and joints.