What does a swaybar do?
The purpose of a swaybar (sometimes referred to as an anti-swaybar, rollbar, anti-rollbar, or stabilizer bar) is to keep the body of the car parallel with the wheels during a turn; this helps to reduce body roll. Body roll is undesirable; the more the body rolls, the more weight is shifted to the outside wheels. When the weight is distributed more evenly, the inside tires can do some of the work that the outside tires were doing before, allowing for more “grip” while turning. This also has the effect of altering the load carried by an end of the car. Stiffening the rear swaybar increases the load carried by the back end of the car while cornering. Stiffening the front swaybar increases the load of the front of the car while cornering. The more load an end of the car carries, the harder it is for that end of the car to turn. Using a stiffer swaybar in the back of the car causes the back to carry more load which in turn allows the front of the car to turn better — reducing understeer (o
