That being said, for your normal needs at home, you should choose a belt with at least a 2-ply rating. There may be some brands who have 1-ply belts especially the cheap ones. I would suggest to avoid those. Fortunately, most famous brands have made the quality of their treadmill belts of good quality with moderate to high resistance against snapping and rapid wear and tear. A 2-ply belt comes usually as a standard in many of their models these days even with the lower priced models. There are also models which have 3-ply belt ratings or more especially with the high-end brands.

Belt width should also be factored in. A wider belt tends to be the better bet most of the time. Narrow treadmill belts tend to constrict the movement of your lower limbs which can make you uneasy as you jog or run on the treadmill equipment. In most situations, an 18-inch wide belt may suffice. Please note that the wider the belt, the price of the electric treadmill tends to go higher due to the wider frame it would need to accommodate the belt.

Belt length should not be neglected. A person with longer lower limbs tend to have a longer motion range as he or she jogs on the belt surface. In most cases, an electric treadmill belt length of 4 feet can be adequate for persons of average height. However though, taller individuals might need more than 4 feet of belt length in order to accommodate their limb motions. One good way to measure if you would be comfortable with the length of the treadmill belt is to do some actual testing. Most shops selling these are will be more than glad to give you a test run.