Several spring types work on multiple and different vehicles. Some springs are designed to bear heavy loads, some are built for performance and some are built for ride quality. There are springs that are factory installed and others that are available aftermarket. In all situations, springs are combined with either a shock or strut to absorb bumps in the road.
Coil Springs :
Coil springs sit separately from the shock in a coiled shape. This type of spring is primarily found in older cars and in heavy trucks. Located on the front suspension of the vehicle between the upper and lower control arms, coil springs carry heavier loads but do not provide the highest ride quality. They are mainly used with the independent suspension, though they have also been used in the conventional rigid axle suspension as they can be well accommodated in restricted spaces. The energy per unit volume is almost double in the case of coil springs than the leaf springs. The coil spring is a length of round spring steel rod that is wound into a coil.