Maneuverability: The 3 wheel design includes one wheel in the front with the purpose of being able to make turns easier. A four wheel option needs to be picked up or moved in a cumbersome manner, which doesn’t allow for the same fluid mobility that the 3 wheeled walker allows. Lighter: A lack of a fourth wheel allows these walkers to be lighter to move. And you’ll also find that they fit better in the back seat of an automobile or in the trunk. Locking Brakes: These 3-wheeled walkers come with locking brakes that keep the walker firmly in place when you need it most.