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4 Wheel Mobility Scooters For Sale Scooters are less expensive and simpler to maneuver than power wheelchairs on uneven surfaces. However, they require a straight posture, as well as shoulder and hand strength to operate. If you're a person suffering from chronic disabilities, Medicare and Medicaid insurance coverage could cover an electric scooter. But this isn’t always the case. Wheels The wheels of a four wheel mobility scooter provide more stability than a three wheel model.