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THE DOWNHILL

The downhill 123

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Page 1: The downhill 123

THE DOWNHILL

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The downhill

The official story is that the MTB has its origins in the late 70s, in the foothills of Mount Tamalpais, California, United States. A group of fans friends motorcycles, roamed these hills, each competing in downhill races against the clock. Soon it was banned circulation of these vehicles, because of pollution and erosion caused by the environment. However these "crazy" of two wheels, they managed to continue their move, but now declines made them standard road bikes, then uploading them on truck. In this way faults are produced in these rudimentary motorized bicycles and also aid was still harmful to the environment. Gradually they were experimenting with different types of machines, equipping them with pieces of motorcycles or their manufacture themselves to a more resistant ground conditions bike also many enthusiasts of that time considered unacceptable the idea of climbing in truck and preferred to do by their own means. Gary Fisher was one of the pioneers of this idea, so he managed to adapt to your bike gear that allowed him to climb those hills pedaling. Thus a total independence of polluting and noisy machines, being able to practice their sport in peace by those hills of California was achieved.

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PARTS OF A BICYCLE

1) Suspensions 2) Tensor3) Brakes4) Tires5) Chain

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FUNCTION OF EACH PART

Suspensions : The main function of absorbing the irregularities of the land on which it moves

Tensor : The role of a tensor is like his name says give to a belt tensor that this is not out of place also prevent other bar pulley

Brakes : The bicycle brake is a system to stop , reduce or maintain with no increase , the speed of a bicycle.

Tires : Las llantas tienen dos funciones principales, tracción y dirección. La tracción es proporcionada por la llanta trasera y la dirección nos la da la llanta delantera.

Chain : Permite transmitir un movimiento giratorio entre dos ejes paralelos, pudiendo modificar la velocidad pero no el sentido de giro

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TYPES DOWNHI

LL 1) Cross-country2) Marathon Bike3) All montain 4) Dirt jump 5) Freeride 6) Slalom 7) Up hill

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Cross CountryCross Contry : Usual form of mountain

biking . The front suspension bikes usually wear only, but also begin to use rear suspensions . This test is to give a certain number of laps on a circuit whose length is usually between 8 and 11 kilometers .

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Marathon bike Marathon bike : Mode which is a journey of 65 to

100 km , there are longer tests 150-200 km ( Salzkammergut [1 ] ) . It is usually used the same type of bike in cross country, though somewhat more robust , as the reliability and comfort are vital in such long races. Also they included in this modality stage races such as the Trans Alp, the Transrockies , the route of the conquistadors, etc. This approach has gained wide popularity in recent times, for their competitions both professionals and amateurs are usually open

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All montain All montain : This mode ( not competitive )

attempts to provide aggressive drivers with extensive bike routes ( 150mm to 160mm ) in suspensions , but keeps bikes at low weights and with designs that allow easy pedaling , especially on slopes . These bikes are designed for long recreational trips.

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Dirt jumpDirt Jump : This mode (competitive and

recreational) is characterized by small , light and very resistant bicycle built for recreational diving , where the driver must be very experienced and agile. In it, the cyclists are measured by performing jumps and tricks on dirt ramps

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Freeride Freeride :This mode (recreational ) is

characterized by bicycles with less emphasis on weight and higher in the suspension travel , without being so robust , heavy or bicycle tours as Descent ( competitive ) . These bikes allow pedaling on the rise, but they are not built for long distances.

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Slalom Slalom : Drop -like mode in which you

compete in a downhill track with flags and ski -style doors .

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Up hill Up hill : Mode in which you compete against

time and distance. The route is only rise , and wins who does the shortest time and the longest distance in the ascent.

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responsible: Juan Manuel LondoñoJuan Alejandro Henao Santiago CuervoFelipe Usma