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Dołączył: 25 Mar 2011
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Wysłany: Sob 4:32, 16 Kwi 2011 Temat postu: Boston Bruins Hockey Different Kinds Of Bicycle Br |
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tory's first bicycles had no brakes. Band-aids hadn't yet been contrived, so the next plausible tread was to design a stopping system. Thus,[link widoczny dla zalogowanych], brakes were born to assist riders deduct from and stop, and bicycles suddenly became more popular. By increasing frictional compel on the wheels, cyclists were competent to slow down and stop.
The 1st warmhearted accustomed braking system was shrieked "the plunger". It 1st appeared ashore the high-wheeled bicycles that were renowned in the 1800s. The plunger operated ashore a easy conviction. To cut down a bicycle, a pry was either pressed down alternatively dragged up, causing a metal show to press against the external side of the tire. Of course, the friction built reasoned excess wear and cut on the tire. Cyclists base namely the plunger did not work well with pneumatic tires, even afterward covering the metal shoe with rubber. Wet surfaces were another drawback, for water decreased the friction between the brake boot and tire, reducing the braking power.
The afterward important evolution in bicycle brakes was the "coaster brake". Most of us have used coaster brakes,[link widoczny dla zalogowanych], still popular in pint-size toddler bikes and tricycles. Some utility bicycles and cruisers too use coaster brakes. The conception after coaster brakes is simple reverse motion. When the drives are pushed in a reverse way, the brake mechanism inside the centre of the wheel pushes outward, creating friction and slowing down the bicycle. Coaster brakes are very muscular and tend to bolt up and skid the rear wheel while engaged, so they're large alternatives for pavement burnouts.
Most of today's mountain, road and stunt bikes use caliper rim brakes. By pulling a lever, a cable is constricted. This cable then forces the brake pads or shoes to press against the inner rim of the wheel, stopping the bike. Caliper bicycle brakes are light and relatively cheap,[link widoczny dla zalogowanych], but they do come with their own set of problems. Not hugely effective on raining days, wet brakes take twice as long to stop a bicycle for the water reduces friction between the brake and the wheel. Caliper brakes work best when pressure is applied gently.
It is important apt poise the braking among the front and rear brakes while riding. If also many stop pressure namely applied to the front wheel, your momentum and body inertia will take you right over the handlebars.
Over the decades, braking systems and materials have changed, but the fundamentals of slowing and stopping a bicycle have not. Bicycle brakes are still based on the concept of friction, and are still vitally important to your safety.
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