Monster trucks are pickup trucks that have been modified with huge wheels and high suspension to make them look enormous. Part of the attraction to monster trucks is simply driving around in such a large car, but monster trucks can be used in competitive motorsport as well. Generally races will include large obstacles for the trucks to overcome or crush, and this has made it extremely popular as a spectator sport. All monster trucks use four-wheel drive so that they can more easily mount objects in their path and put on an impressive show. .