THE JQRacing 2.8mm Rear Swaybar. Swaybars are a useful tool that can be used to change the balance of the car, and are used to adjust the car’s lateral grip. The basic setup for the White Edition is 2,3 front, 2.5 rear. Thicker swaybars are used on high grip tracks, specially if they are high speed also. Normally a larger difference than 0.2mm between front and rear swaybars is not used. For less steering, and a more stable car, increase the thickness of the front swaybar.