The truck should be made with aluminum alloy. The three important parts of the trucks are the baseplate, the hanger and the bushings. The bushing is the rubber pivot point where the truck turns the skateboard. There is a screw or kingpin that connects the pieces. The tighter the kingpin, the tighter the truck. The tighter the truck, the more stability.The width of the truck should be fitted to the width of the deck. This is usually the same width or slightly smaller. Trucks that are too big can make doing tricks difficult. Trucks that are too small can limit your stability.