Lock your bike in, go hard, and don't make a sound? CycleOps' The Silencer Direct Drive Mag Trainer uses whisper-quiet magnets for five levels of resistance, from easy to mega-watt efforts. The wide stance ensures stability even during out-of-the-saddle sprints. With its direct drivetrain, your bike is completely locked in to maximize the secure, road-like feel. Additionally, it saves wear and tear on your rear wheel.