Sunny Health & Fitness SF-B2605 Upright Exercise Bike, Compact Foldable Home Indoor Bike Bikes with magnetic resistance never come in contact with the flywheel, resulting in a silent, stable and virtually low maintenance experience. The closer the magnet the greater the resistance will be Adjustable 8-level magnetic tension control System Easily folds and unfolds for stowaway Convenience Exercise meter displays time, speed, Pulse, distance, calories burned, Scan Max. User weight 220 lbs