One of the most essential features in a treadmill comparison is the warranty. The warranty really would say it all. It would make sense that if a treadmill is not built to last then the manufacturer will not back it with an extensive warranty. A simple comparison of the treadmill warranty will tell you if the machine is built to last years or months.
On quality treadmills the warranty will differ with different parts. You may find a separate period for the motor. Even though are treadmill replacement motors, if the warranty exceeds five years then you can be reasonably assured that the motor is quality and built for endurance. Most important, is that the motor is sufficient for regular vigorous use.