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4 Wheel Mobility Scooters For Sale Compared to power wheelchairs, scooters are cheaper and are easier to maneuver on uneven surfaces. However, they require an upright posture, shoulder and hand strength to use. If you have a chronic disability, Medicare or Medicaid may provide the cost of a scooter. But this isn’t always the situation. Wheels A mobility scooter with 4 wheels offers greater stability than a 3-wheel model. This is helpful if you have a condition like Parki