In suspension design, what factor can be influenced by the choice of spring materials?

The choice of spring materials directly impacts the overall weight of the vehicle due to the varying densities and strengths of different materials. For example, using lightweight materials like aluminum or composite materials in spring design can reduce the weight compared to traditional steel springs. This reduction in weight can enhance the vehicle's performance, improve fuel efficiency, and contribute to a more responsive suspension system. In contrast, opting for heavier materials would lead to an increase in weight, which can adversely affect these aspects. Therefore, the correct factor influenced by the choice of spring materials is indeed the overall weight of the vehicle.