The treadmill is one of the most popular gym tools. This gym machine is used for treadmill exercise where it belongs to cardio workouts. If you are interested in a treadmill, there are many options that you can consider. From various options available, there are 2 best options. They come from Sole Fitness products: F63 and F65. Which is better? To know the answer, we will discuss about Sole F63 Vs F65 in this article. In addition, we will also compare them to 2 other best products.