These are the most common and simple of all SketchyPhysics vehicles. A basic one can consist of a box with 4 powered wheels, one in each corner. Sometimes, they will have a suspension system as well.
Made in sp1 these cars were abysmal. They consisted of a basic box on wheels, with no steering or propulsion. however, they were very common on the 3D Warehouse.
This is when ground vehicles dramatically improved. Steering was added, and vehicles became fully controllable. Also introduced in this version was the concept that the camera could be controlled automatically; vehicles with first person views began to emerge.
Vehicles being made in this version are often highly advanced. They can come with a fuel system, artificial down force, and even instruments that monitor the vehicle's condition. They can also use script in them to create: differentials, gearboxes, and simulate throttle response.