What is the primary purpose of springs in a vehicle's suspension system?

The primary purpose of springs in a vehicle's suspension system is to maintain ride height. Springs play a critical role in supporting the weight of the vehicle while balancing the load across all wheels. They help ensure that the vehicle maintains a consistent height above the ground, which is vital for optimal handling and safety. By maintaining ride height, springs also contribute to the overall geometry of the suspension system, allowing other components to function correctly.

While springs do contribute to shock absorption by compressing and rebounding as the vehicle travels over uneven surfaces, their main function is to support the vehicle's weight and keep it level. Additionally, maintaining ride height aids in stabilizing the vehicle, though that is more directly a function of a combination of factors including the interaction of springs with dampers and other suspension components. Springs themselves do not directly adjust tire alignment; that is typically managed by camber, toe, and caster adjustments made through the suspension geometry.