The Adidas C-21 Exercise Bike comes fully equipped to help build cardio endurance and target lower body muscles through variable cycling sessions. Power through interval training on a smooth magnetic flywheel with 24 levels of automatic resistance. Setting goals has never been more achievable with the C-21's intuitive console, relaying workout data while you ride. The signature adidas Ultra Series red LED lighting powers up when you create energy, encouraging riders to maintain momentum and test their limits.