Wheelchairs are divided into two main categories, indoor wheelchairs and outdoor wheelchairs. Indoor wheelchairs come with small wheels for easier torsion in the interiors of an apartment. To move the patient with indoor wheelchairs requires the presence of a caregiver for moving. Outdoor wheelchairs come with large wheels and the patient can be moved autonomously by himself or his caregiver. The large radius of the wheels helps to move outdoors even in more difficult places with an anomaly on the road or on the floor when they are driven by the patient himself or by his caregiver.