The manufacturer pointed out that making the van shorter at the rear would cause the cargo to shift towards the front, and might overload the axle. In fact, there is a natural compensation in the distribution of the load.
"Os construtores do artefacto dixéronnos que a redución da parte traseira do camión desprazaría o peso cara á parte dianteira, ... co risco de sobrecargar o eixo dianteiro, pero en realidade o equilibrio restablécese involuntariamente,