In both road and rail vehicles, the wheelbase's the distance between the centers of the front and rear wheels. Road In automobiles, the wheelbase's the horizontal distance between the center of the front wheel, and the center of the rear wheel. At equilibrium, the total torque of the forces acting on the car's zero, and thus the wheelbase's related to the weight on each tire by the following formula: » W_f = 's the height of the CG above the ground, a's the acceleration (or deceleration if the… (More on Wheelbase)