I installed some Potenza tires and they have VERY heavy sidewalls and I after I had them installed I always had a annoying bounce, the tire tech said I had a rim that was 'not quite right', long story short Ive been living with it as they are cent's so I cant very well go buy one right away. I installed the swaybar and it all but got rid of the bounce, even at 125mph it wasnt all that bad.