Coil springs are also often featured in solid-axle systems, such as a 4-link, which is superior to keeping a the axle in place and eliminating issues unique to leaf springs, ...

Air shocks and air suspension — also called air bags — are similar sounding systems with very different designs. Here's what ...

Coil springs, which are basically just steel loops wrapped around a strut, pretty much eliminate any frictional issues, meaning they start absorbing the bump right away.