u/Ok-Tourist-511

Every day, techs tell people commercial treadmills are better, but they don’t seem to understand. These photos compare the size of a Sole F85 roller to the size of just a bearing for the roller on a commercial treadmill. As you can see, just the bearing is larger diameter than the entire roller on the sole. The large bearing can handle the tension of the belt better than the small bearing, and the larger diameter roller turns slower.