Skateboarding Girl

• The 1970s
In the early 1970s, Frank Nasworthy started to develop a skateboard wheel made of polyurethane, calling his company Cadillac Wheels. Prior to this new material, skateboards wheels were metal or "clay" wheels. The improvement in traction and performance was so immense that from the wheel's release in 1972 the popularity of skateboarding started to rise rapidly again, causing companies to invest more in product development. Nasworthy commissioned artist Jim Evans to do a series of paintings promoting Cadillac Wheels, they were featured as ads and posters in the resurrected Skateborder magazine, and proved immensely popular in promoting the new style of skateboarding. Many companies started to manufacture trucks (axles) specially designed for skateboarding, reached in 1976 by Tracker Trucks. As the equipment became more maneuverable, the decks started to get wider, reaching widths of 10 inches (250 mm) and over, thus giving the skateboarder even more control. Banana board is a term used to describe skateboards made of polypropylene that were skinny, flexible, with ribs on the underside for structural support and very popular during the mid-1970s. They were available in myriad colors, bright yellow probably being the most memorable, hence the name.
Manufacturers started to experiment with more exotic composites and metals, like fiberglass and aluminium, but the common skateboards were made of maple plywood. The skateboarders took advantage of the improved handling of their skateboards and started inventing new tricks. Skateboarders, most notably Ty Page, Bruce Logan, Bobby Piercy, Kevin Reed, and the Z-Boys (so-called because of their local Zephyr surf shop) started to skate the vertical walls of swimming pools that were left empty in the 1976 California drought. This started the vert trend in skateboarding. With increased control, vert skaters could skate faster and perform more dangerous tricks, such as slash grinds and frontside/backside airs. This caused liability concerns and increased insurance costs to skatepark owners, and the development (first by Norcon,then more successfully by Rector) of improved knee pads that had a hard sliding cap and strong strapping proved to be too-little-too-late. During this era, the "freestyle" movement in skateboarding began to splinter off and develop into a much more specialized discipline, characterized by the development of a wide assortment of flat-ground tricks.
As a result of the "vert" skating movement, skate parks had to contend with high-liability costs that led to many park closures. In response, vert skaters started making their own ramps, while freestyle skaters continued to evolve their flatland style. Thus by the beginning of the 1980s, skateboarding had once again declined in popularity.