Abstract: A tank truck vehicle for transporting fluid or pulverous material, such as oil, comprises in one embodiment a longitudinally extending tubular shell whose length is substantially that of the truck vehicle and which is formed so as to be sufficiently rigid so as to function both as the wall of the transporting container of the vehicle and, simultaneously, as the supporting frame for the vehicle so that there is no need for a supporting beam frame separate from the supporting tank as is conventional. The front and rear wheels are mounted on axle assemblies which are substantially directly connected to the tubular shell.