case in connection with the conventional vehicle construction of fig1 this graph demonstrates that the noise level within the passenger compartment in the case of the present invention was considerably lowered within the frequency range of from 100 to 200 hz as compared with the conventional case in addition the stay 11 shown in fig2 and 3 functions to protect a fuel line 12 in an automotive vehicle of the type wherein the fuel tube 12 is positioned in a space located forward of the spare tire house 9 as shown in fig3 in other words in the event that a vehicle having the conventional construction of fig1 is struck at its rear most section by another vehicle the spare tire housing 9 39 deforms forward to interfere with a fuel line corresponding to line 12 however in case of the vehicle construction of fig2 and 3 the strength of the spare tire housing 9 is reinforced by stay 11 to increase its strength thereby reducing the possibility of interference of the spare tire housing 9 with the fuel tube 12 this the reduces danger of fuel leakage leading to vehicle fire while the stay 11 has been shown and described as connecting the rear suspension member 1 and the spare tire housing 9 positioned rearward of the rear suspension member 1 it will be understood that the stay may be disposed.