Buying a Used 3 Wheel Electric Scooter For Adults You will get more than the initial cost of purchase when you purchase an electric scooter that is used for adults. You will also receive high-quality components, rust-proof hardware and safety features. The frame of this escooter has been constructed of square tubing which provides the best angles for my Mobility Scooters welding. This creates a stronger frame that is less likely to break. Power If you are looking for a used 3 wheel scooters wheel electric Zipr Roo: Folding 3-Wheel Mobility Scooter Easy Transportation for adults, make sure it has enough power to get you there you need to go. A scooter equipped with a high-output motor will offer more speed and range than a model with a lower output motor. To ensure your safety, you should also look for an electric scooter that has both front and rear brakes. A scooter that has a powerful motor and controller is crucial.