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  • Bicycle helmet

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    A bicycle helmet is designed to attenuate impacts to the head of a cyclist in falls while minimizing side effects such as interference with peripheral vision. There is ongoing scientific research into the degree of protection offered by bicycle helmets in the event of an accident, and the effects of helmet wearing on cyclist and motor vehicle driver behaviour. There is active debate over what can be concluded from available studies, and on whether the use of helmets by cyclists should be promoted or mandated, either just for children, or for cyclists of all ages. In particular the debate over bicycle helmet laws is intense and occasionally bitter, often based not only on differing interpretations of the scientific and other academic literature, but also on differing assumptions and interests of various parties. A typical bicycle helmet.

  • Bicycle brake

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    Animation of a single pivot side-pull caliper brake for the rear wheel of a steel framed road bike. A bicycle brake reduces the speed of a bicycle or prevents it from moving. The three main types are: rim brakes, disc brakes, and drum brakes. There have been various types of brakes used throughout history, and several are still in use today. Most bicycle brake systems consist of three main components: a mechanism for the rider to apply the brakes, such as brake levers or pedals; a mechanism for transmitting that signal, such as Bowden cables, hydraulic hoses, rods, or the bicycle chain; and the brake mechanism itself, a caliper or drum, to press two or more surfaces together in order to convert, via friction, kinetic energy of the bike and rider into thermal energy to be dissipated.

  • Ghost bike

    serch.it?q=Ghost-bike

    Ghost bike in London, 2005a stripped down frame and tireless wheels help deter theft A ghost bike (also referred to as a ghostcycle or WhiteCycle) is a bicycle roadside memorial, placed where a cyclist has been killed or severely injured, usually by a motor vehicle. Apart from being a memorial, it is usually intended as a reminder to passing motorists to share the road. Ghost bikes are usually junk bicycles painted white, sometimes with a placard attached, and locked to a suitable object close to the scene of the accident. They are also sometimes stripped of their tires, to deter theft. A ghost bike may also refer to a bike without a rider. By jumping off while the bicycle is in motion, it will continue to roll until falling over or hitting an object that stops it. This is the original ghost bike.__notoc__

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