the most similar to snowboarding. There are two extra castor wheels in the middle of the base that are somewhat lower than the other four. This allows the rider to distribute his weight to only one "edge", as in snowboarding. This gives the rider the ability to slide, an ability no other land board has besides the longboard. Caster board Two narrow platforms known as "decks" are adjoined by a rubber or aluminium coated metal beam that houses a strong spring. Each truck has one wheel that is connected to the board in such a way that each wheel can rotate independently. Both wheels are mounted on slants that measure around 30° in angle, facing away from the front of the board. Similar to Vigorboard (2003) : Constructed from two platforms, each supported by a single caster with a single wheel giving the board a total of two wheels. the two platforms are connected by heavy metal torsion bar that enables the board to twist in the centre. Street Skurfing Similar to Caster board, but the rider can move both feet independently. Freeline skates (2000's) A pair of skates designed to give the feeling of skateboarding, snowboarding, surfing, and inline skates all in one. Freeline Skates are extremely portable, making them the smallest and lightest form of transportation. See also Street Skurfing. Street surfing A split deck board connected by a spring rod to allow each half of the board to twist independently from the other, each side only having 1 caster wheel, allowing for tight maneuvers and self propulsion. On-shore boards A type of board that has four inline wheels and four in the back (two on each side) and is deeply concave in the front. T-boarding A skateboard deck with two wheels that can spin 360 degrees. Off-paved surface Land windsurfing A sport similar to traditional windsurfing that is performed on land rather than water. A four-wheeled deck, similar to a mountain board or skateboard deck, is commonly used in conjunction with a mast and sail in order to project the board across land. Mountainboarding (1992) Similar to snowboarding, but on snowless peaks (in between winter seasons). The board is wider and sturdier. Mountainboarding is similar to skateboarding in the way that mountainbiking is similar to regular biking. Kite landboarding Similar to Kite Surfing but the kite is used to pull the rider along flat ground (often a