Noun
English Wikipedia has an article on:swingarmWikipedia
swingarm (plural swingarms)
(motorcycling) The main component of the rear suspension of most modern motorcycles and ATVs; holds the rear axle in place while swinging vertically to allow the suspension to absorb the shock from bumps in the road.
Most modern BMWs are truly rear swingarm, single sided at the back (compare with the regular swinging fork usually, and wrongly, called swinging arm ). Source: Internet
They can be distinguished from the Softail by the traditional coil-over suspension that connects the swingarm to the frame, and from the Sportster by their larger engines. Source: Internet
Bradl tried a different swingarm and tomorrow he'll continue testing to get to know it better. Source: Internet
The liquid-cooled twin sits in a fresh steel-trellis frame equipped with a new swingarm. Source: Internet
We still need to do some more testing on the lighter swingarm though. Source: Internet