22 is separated from the billet residues and then further processed and mounted fig7 through 10 show the above described tube geometry with the right and left rocker arm assembly 6 which may have essentially the same design the essentially oval shape of the bead 17 is evident from fig8 the oval shape of the bead 17 and the cross section enlarged by the bead 17 are advantageous for reasons of stability since the strength may be weakened in this area by the weld seam 20 the preferably ideal oval cross sectional shape in the connection area of the inner tube 11 and the rocker arm 12 is advantageous for transmitting the resulting forces and for minimizing the weld seam stresses the recesses 18 of varying sizes for accommodating axle stub sections of varying sizes are shown in fig7 and 10 moreover it is evident from fig7 10 19 and 20 that the bending angle u03b1 between the inner axle part 11 and rocker arm 12 is somewhat greater than 90 u00b0 and e g approximately 95 u00b0 preferably bending angle u03b1 is between 90 u00b0 and 100 u00b0 but may also have other values fig1 and 20 will be dealt with below fig1 and 13 illustrate a first variant of the rocker arm assembly 6 and of.