All Terrain Self Propelled Wheelchair This Wheelchair is capable of tackling any outdoor terrain, including mud, gravel and cobbles. It can also be used on snow or grass. This type of wheelchair can also be used indoors. This chair is self-propelled allowing the user to control their own speed. It https://www.mymobilityscooters.uk/products/swift-lightweight-self-propelled-wheelchair-for-seniors-and-disabled