"Development of the Dynamic Suspension Load and Dynamic Suspension Load Coefficient concepts is brilliant ... Well Done" I.M. Ibrahim, Prof Vehicle Dynamics, Helwan University. "The beauty is linking theory and market needs providing intensive and detailed comparison based on the vertical dynamic performance helping manufacturers get the right solution for the right application" H.H. Dadoura, Prof. Automotive Technology, Helwan University. "It is not easy to find such a comparative study between the three different tandems ... it must have been a great job to combine the different configurations into one dimensionless study" M. Tayea, Lecturer Automotive and Tractors Engineering, Helwan University. "It is a comprehensive dictionary for various tandem suspensions available whether patented or available in the market" N.A.Rahman, M.Sc. Automotive Technology, Helwan University.