The kurt kinetic rock and roll 20 smart trainer is an accurate affordable and easy to use trainer kinetic introduces a new smart series power trainers for 2015 to achieve your goals you need focus drive and the right tools for the job there is simply no more effective way to reach your fitness goals than power based interval training the kinetic rock and roll 20 smart offers a wide range of workout options from intervals to threshold work to recovery spins with the smoothest most real