What is the difference between “double action” and “single action” plate ? Last Updated: 08/23/2011
The single action has one cushion, usually made of rubber or polyurethane, that sits top of the boss on the truck. The double action has two cushions, one above and one below the boss. The single action has more of a snap type action to it then the double action. It was initially developed for use by roller derby skaters, as it tends to give a feeling of clinging to the skating surface and rolls well over non flat surfaces such as banked tracks and roads. Single action trucks are very sensitive to the slightest move of the skater's foot and are not usually used for artistic or dance type skating which requires more control. The lower cushion on the double action truck helps to dampen the movements a little bit and make one footed spins and trick movements more manageable.