An all-plastic wheeled personal mobility device that incorporates a seat-support system for a person with a disability or a person without the full capacity to walk (non-bariatric) and designed to be manually propelled by the occupant while seated in the device or by an attendant. The occupant moves the device by rotating both rear wheels. An attendant moves the device by pushing or pulling handles on the device. It contains no metal parts and may be safely used in magnetic resonance imaging (MRI) environments and security scanners, submersed in water (e.g., swimming pool, balneotherapy), and used in a shower. The device cannot be folded or readily dismantled for transport.