A skateboard assembly includes a platform or board, a plurality of spaced wheel axles and pivotally secured set of arms connected to the frame at opposite ends of the skateboard. The truck suspension system provides shock-absorbing capabilities and includes an improved shock-absorbing system that can be easily interchanged to create a desired amount of shock-absorbing capability for the skateboard. The shock-absorbing system includes an outer shock member which encases at least one shock-absorbing insert. These shock-absorbing components are placed between each arm of the truck assembly and the board to absorb shock. The shock-absorbing insert is interchangeable so that the amount of shock absorption can be changed depending upon the rider's weight or to attain a particular ride feel. A quick release strap-down system utilizes hook and loop fasteners to create a system for easily and quickly interchanging the shock-absorbing components. A steering control system includes a resilient dampener which is adjustable to restrict the steering rotation of the wheel axles to provide shock absorption for the truck suspension system.