Call it a knee walker, a knee cruiser, an orthopedic scooter or a roller coaster, but one thing for sure is that knee scooters have revolutionized the world of ambulation assistance. This scooter with two, three, four or even five wheels allows you to walk comfortably, safely and accelerates the healing process. It comes in many forms and types, and the effectiveness of each varies from one situation to another and is also influenced by individual preference.