A gravity wagon, also known as a slant wagon is a piece of agricultural machinery which, is an angled hopper type wagon that is built to allow gravity to make the unload easier. The wagon has three sides, which are angled at about 45 degrees, while the fourth side is vertical. There is an unloading door near where the angled sides come together. The design causes the grain in the wagon to funnel towards the door. The gravity wagon is widely used and is an excellent tool to make one's job lighter and more efficient. They can usually be bought either new or used.