I made two simple but useful bike racks out of a 2x4 and some screws (it helps to have a miter saw). I made an L bracket out of the 2x4 and secured it to a stud in the garage. I made the horizontal piece on the bracket 9 inches. It only took about 20 minutes to make both brackets and mount them on the wall.
By Roger from Hampton, VA
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When I dropped off my bike to be serviced at the local bike shop, the salesman showed me how they hang the bikes on large J-hooks and alternate the height of the hooks so they can hang them closer together.