Länkarm

Länkarm is a Swedish term that translates to "link arm" or "control arm" in English. It refers to a suspension component found in most vehicles, playing a crucial role in connecting the wheel hub or steering knuckle to the vehicle's chassis. The primary function of a länkarm is to allow the wheel to move up and down in response to road imperfections while maintaining the desired position relative to the vehicle body.

There are typically two länkarmar per wheel, often referred to as the upper and lower länkarmar. These arms are usually pivotally mounted to the chassis at one end and connected to the wheel assembly at the other. This pivoting action allows for controlled movement of the wheel, ensuring that it remains in the correct orientation for steering and stability. The precise geometry and length of the länkarmar are critical for achieving proper wheel alignment, camber, caster, and toe angles, which directly impact vehicle handling, tire wear, and ride comfort.

The länkarmar are generally made from stamped steel, forged aluminum, or sometimes cast iron, chosen for their strength and durability. They often incorporate bushings or ball joints at their pivot points to absorb shock and vibration, contributing to a smoother ride. Worn or damaged länkarmar can lead to a range of issues, including poor handling, uneven tire wear, and excessive noise from the suspension.