The lateral and rolling components of the magnetic springs of superconducting Maglev vehicles are strongly coupled, and their characteristics are barometers to decide the take-off velocity of the vehicle. In order to design Maglev vehicles effectively, it is important to understand the principles to be applied to determine the spring specifications with respect to the design parameters: the gap and the magnetomotive force of the superconducting magnet. In this paper, a study using computer simulations on the effect of changing the design parameters is described, referring to the principles of electrodynamic suspension and the vehicle dynamics of Maglev vehicles.