Trucks

Trucks are the axle for a skateboard. Trucks are the metal T-shaped part that mounts onto the underside of the board, that the wheels will be attached to. A regular skateboard will have two trucks, each facing each other. Trucks can be adjusted to be either more or less stiff -- skateboarders should adjust this to their liking. Skateboard trucks have several parts - the hangar, the kingpin, the axle, and the bushings. To find out more, read this skateboarding dictionary entry on skate trucks.

Source: http://skateboard.about.com/od/skateboardingdictionary/g/GlosTrucks.htm

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