A swaybar is a suspension component designed to reduce body roll under cornering loads. A swaybar runs across the car and connects the suspension from left to right, increasing the car’s roll stiffness, or resistance to body roll.

Under cornering, the outside spring compresses while the inside spring relaxes. This type of loading puts a twist into the swaybar, which effectively transfers some of the cornering load to the inside spring. The outside spring experiences less load and therefore compresses less, while the inside spring sees more load and extends less, resulting in less body roll.

When passing over a bump that extends the whole width of the car, such as a speedbump, both wheels move together and there is no twist placed in the swaybar, so the car acts the same as if there were no swaybar installed.

The Shine Rear Swaybar mounts inside the rear torsion beam, increasing its torsional stiffness, and therefore the roll stiffness of the car.