The spirit fitness ct850 treadmill offers users with an effective and efficient workout while at the same time providing them with easy use of all the key features that this treadmill has not only is the treadmill top quality in performance but it is also easy on the eye with its slick aesthetic design one feature of the ct850 is the smooth running brushless 4 0 ac drive motor which adds to the reliability of this treadmill while also providing the torque and smooth continuous power required