Find a good portable treadmill is not always easy thing, but it can be very rewarding once you find it. First and foremost you need to be sure to find the treadmill that is right for you and will do everything that you need it to - otherwise that piece of fitness equipment will become some thing in your garage to stuff boxes around and on. The first thing you need to consider in purchasing portable small treadmills is the quality of the build. Many people look to purchase these because they are generally cheaper than other options. Sadly, when it comes to fitness gear, cheaper usually means lower build quality and no-quite-so-long-lasting equipment. Essentially, you can end up purchasing something that won't even last a year if you are a moderate runner (10+ miles per week), or if you are a bit overweight. If you are a little bigger than you would like to be just make sure that the treadmill is build for someone your size, and I'm not just meaning how much you weigh. You also need to be sure that the running mat dimensions are suitable for your height. Many times equipment that is build to be portable is also meant to be small. While not a bad thing for the general public, if you are over six feet tall then you will want to double check this quite thoroughly since nothing is worse than buying a treadmill that you can't even run on. If you are looking to purchase this online and you are tall, then it is worth your time to go to a store to find out what size of treadmill you need. Finally, make sure the portable treadmill is easy to set up and to take down. I'm assuming that you are looking at the best portable treadmills mainly because of there portability, so make sure you at least get that aspect of it.