Theses are also referred to as Bike Racks, they are essentially a device in which bicycles can be secured to. Sometimes they are attached to the ground or the side of a building, other units are free standing. The first of these to be manufactured used to offer a means to secure one wheel, they were often a forked piece of metal in which the front wheel of the bike was held in between or grooved concrete in the ground.
Click Here to read the entire article...