A skateboard is a type of sports equipment used for skateboarding, which is an action sport that involves riding and performing tricks using a skateboard
. It is usually made of a specially designed 7-8 ply maple plywood deck and has polyurethane wheels
. The skateboarder moves by pushing with one foot while the other foot remains balanced on the board, or by pumping one's legs in structures such as a bowl or half pipe
. The metal parts known as skateboard trucks are what hold a skateboard's wheels to the deck. They are made up of a hanger that holds the axle and wheels and a baseplate that is mounted to the deck
. The hanger and baseplate are joined by a kingpin, allowing the truck to swivel and turn
. Skateboards can be used for various purposes, such as transportation, recreation, and as an art form
