There are many different brands of fold up treadmills. Depending on what your exactly looking for, many have alot of extra options to choose from. Some even fold and unfold by themselves. Some of the top brands are Sole F85 Treadmill by Treadmill Doctor, Smooth 6.45 Foldup Treadmill, Bowflex 7-Series Folding Treadmill, Pacemaster Gold Foldup Treadmill and the Smooth 5.45 Folding Treadmill.