History
Early models tend to offer a means of securing one wheel: these can be a grooved piece of concrete in the ground, a forked piece of metal into which a wheel of the bicycle is pushed, or a horizontal ladder providing positions for the front wheel of many bicycles. These are not very effective, since a thief need only detach the wheel in question from the bicycle to free the rest of the bicycle. They also do not offer much support, and a row of bicycles in this type of stand are susceptible to all being toppled in a domino effect. These types of stand are known as "wheel benders" among cyclists.
A modern version is known as the "Sheffield rack" or "Sheffield stand", after Sheffield in England where these were pioneered. These consist of a thick metal bar or tube bent into the shape of a square arch. The top part is about level with the top bar of the bicycle frame, and thus supports the bicycle and allows the frame to be secured. The origin of the racks was when the frugal citizens of Sheffield had to decide what to do with some old gas piping. Local cyclists suggested the cycle rack idea and two simple bends later, and a little concrete in the ground, the rack was born. At the time this was a revolution in a world of 'single-point holders' that bent wheels and offered little lockability for frames. A High-quality versions feature a second, lower horizontal bar to support smaller bikes (this version is also known as “A stand”), and are coated to reduce their surface hardness and not scratch paint.
Since 1984 the City of Toronto has installed post and ring bicycle racks consisting of a steel post topped by a cast aluminium ring. In August 2006, it became publicly known that these stands could be defeated by prying the ring off with a two-by-four
In Amsterdam two-tiered bicycle stands are ubiquitous. Bikes can be parked in a smaller area as the handlebars (usually wider than the back of the bicycle) of every other one is at a different height (either high or low). These racks are made of steel and have a large bar to which the frame may be easily locked. Most Dutch bicycles have a rear wheel lock, so that wheel need not be locked.
Read more about this topic: Bicycle Stand
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