4 main supports connect your entire bar and roof to the lower frame. Stress from bumps and swaying can cause the welds to begin to break and put the whole bikes safety and integrity at risk. Once one weld cracks (typically the front 2 posts first) the swaying increases and adds more stress to the rest of the bikes supports. Protect and fix this issue with an easy to install, clean professionally made bolt on support. Bolt on using the existing bike bolts with no drilling or welding required. Never weld with sloppy looking touch-up paint on these areas again!