Super Big WheelchairWheelchairs that are considered oversized are generally heavy-duty chairs. They are oversized to allow a higher weight capacity and/or features that are catered towards larger individuals. Oversized chairs have a lower turn radius and maneuverability is also lower than the average wheelchair. Oversized chairs have a weight capacity up to 500+ pounds, which means that it can handle a wheelchair-bound individual who may be as large as 500 pounds. If a chair is categorized as “oversized” or heavy duty, you’ll more than likely find out that it is also heavier than the average wheelchair. Heavy-duty chairs weigh more because the frame was designed to be an exceptional weight-bearing device.