Skateboards

The skateboard has evolved since the first mass produced models in the 1960s. Boards in the past were often made in the shape of a surfboard, with no concavity and constructed of solid wood, plastic, even metal. The wheels were usually made of a clay composite, or steel and the trucks (axles) were less sturdy and initially of a 'single-action' design compared to today's 'double-action'.

A skateboard is a four wheeled platform used for the activity of skateboarding. It is propelled by pushing with one foot while the other remains on the board, or by pumping in structures such as a half-pipe or bowl. A skateboard can also be used by simply standing on the deck while on a downward slope and allowing gravity to propel the board and rider.  The definition of a skateboard can vary in both appearance and performance as well as size.