Editing Anti-roll bar (section)

=== MacPherson struts ===
The [[MacPherson strut]] is a common form of strut suspension. This was not the first attempt at strut suspension, but in [[Earle S. MacPherson|MacPherson]]'s original patent, the anti-roll bar forms an integral and essential part of the suspension, in addition to its usual function in controlling body roll. A strut suspension like MacPherson's requires a hinged lower member between the chassis and wheel hub to control the wheel position both inwards and outwards (controlling the track), and also forwards and backwards. This may be provided by a [[wishbone suspension|wishbone]] with a number of joints, or by using an additional [[radius rod]]. MacPherson's design replaced the wishbone with a simpler and cheaper [[track control arm]], with a single inboard joint, to control the track. Forward and backward position was controlled through the anti-roll bar. Overall this required a simpler and cheaper set of suspension members than with wishbones, also allowing a reduction in [[unsprung weight]].

As the anti-roll bar is required to control wheel position, the bars of a MacPherson strut suspension may be connected through ball joints. However many later "MacPherson strut" suspensions have reverted to using wishbones rather than the simplified track control arm of the original design.