All Terrain Self Propelled Wheelchair It Is capable of handling almost any outdoor terrain like cobbles, mud, gravel, grass and snow. This type of wheelchair can also be used indoors. The self-propelled design of this chair enables the user to dictate their speed, which allows them to be more independent. https://www.mymobilityscooters.uk/products/aluminium-narrow-self-propelled-wheelchair-16-seat-width