However, you can find manual adjustments with the cheaper models and be in control by turning a knob. An experienced eye can deduce the deterioration of the treadmill by observing the tread of your belt, the paint close to the handrails, the functioning in the console, and many more. http://compass-Framework.com:3000/adelinefifer8/walking-pads1998/wiki/Treadmill+Maintenance+--+11+Tips+For+The+Care+Of+Your+Treadmill