Ask anyone who’s ever lowered or lifted a truck and needed to compress a coil spring how nerve racking it can be. Truck coil springs are large and designed to hold the weight of a 4,500-5,500-pound ...

The most common coil-spring front suspension uses two control arms (also called A-arms because of their shape) per side, mounted to the frame, and a coil spring between them that exerts force on only ...