What Advantages Do the Wall Shelf/Racks Have Over Overhead Ceiling Shelves?

They can hold at least four times the weight capacity. There will be no stress cracks as typically seen in ceiling racks. They do not affect the amount of light in the garage. Items can be stacked as high as the ceiling will allow. The height can be exactly customized to your needs. There is an added option to hang items under the shelves with bars and hooks.