CycleOps Mag Trainer with Adjuster. When you can't train outside, you can train indoors on the CycleOps Mag Trainer with Adjuster. Redesigned, 5 positon adjustment makes it easy to vary the intensity of your workouts and provides a more life like feel. Handlebar mounted shifter adjusts resistance as you ride no more getting off your bike in the middle of your workout. Magnetic resistance runs super smooth and nearly silent, so you can ride this trainer in front of the TV. Foldable V frame sets up quickly and easily for on the spot spins.