Fitness Reality 2000F Magnetic Rower Rowing Machine with 12 lb. Flywheel and Smart Tension Knob, Black $399.00 Make sure this fits by entering your model number. Smart knob Technology: Measures watts, calories, time and distance with our 3-method process, Flywheel RPM, Smart Knob, pull length Take your workout to the next level with a 12lb exposed flywheel & 14 levels of adjustable silent magnetic resistance.