Suspension is one of the most vital sub-system in an automobile and has three major tasks namely comfort, control and contact. One major component of the suspen-sion system are dampers and spring which are responsible for handling and comfort of the vehicle. If not designed correctly, suspension system might create problems like difficult control, uncomfortable experience and in worst case scenarios toppling of the vehicle leading to danger of harm to the life of passengers. The purpose of this research is to calculate the optimum stiffness of the coil over spring for the commercial light motor vehicle from where the de-signing of the system can be started and other parameters can be designed later on. An iterative approach has been used to determine the stiffness of the springs to be used in order to optimize the performance of the vehicle, keeping in mind the driver safety and maximum driver comfort. The stiffness of the spring is calculated and through the ride frequencies of the front and the rear of the vehicle and checking if the roll gradient targeted is achieved. If not, the process is repeated till the roll gradient is achieved.