Coilover

Coilovers are used in double wishbone suspension systems,[2] and are often a component of MacPherson struts.

[4] There are a large number of companies who make aftermarket coilovers for vehicles, many of which allow the customer to adjust various settings such as ride height and damping.

[5] This high degree of adjustment is what gives coilovers an advantage over typical MacPherson struts.

Coilovers are made up of several components, including the damper, coil spring, bushing, bump stops, upper and lower mounts, various nuts and washers, threaded sleeves, and collars.

[8] The purpose of coilover springs is to prevent the chassis from bottoming out, support each individual wheel on the vehicle, and mitigate or reduce body roll when taking turns and cornering, particularly at higher speeds.

This can present a problem for vehicles whose ride height needs to be lowered but whose springs are already stiff enough.

[9] A mono-tube coilover is a single piston and rod assembly in a damping case in which both compression and rebound occur.

[9] Nitrogen-charged struts can be used as a more stable alternative to coilovers since they do not unload or push off, increasing stability.