A truck assembly having a mounting plate with a first mounting bracket with a first arm, a second arm and a ridge; a cushion with a front surface that defines a concave segment, a rear surface that defines a notch that receives and seats the ridge, and a first lateral surface and a second lateral surface; an axle assembly having a wheel shaft and a truck support with a first cushion support arm and a second cushion support arm; and a swing pin releasably joining the cushion and the axle assembly to the first mounting bracket.