Bedienungsanleitung Stevens Allround Trekking Bikes - 2014 (Seite 22 von 83) (Englisch)

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5. The Brake System

In general the brakes of your bicycle are necessary to adjust your speed

to the traffic situation. However, in an emergency the brakes must be

able to bring your bicycle to a halt as quickly as possible. Such emer-

gency braking is also a study in physics. In the process of braking, the

rider’s weight shifts forward, thus reducing the load on the rear wheel.

The rate of deceleration is primarily limited by the danger of overturn-

ing and only in the second place by the road grip of the tyres. Such a

problem becomes particularly acute when riding downhill. In the event

of an emergency braking you have to try to put your weight back as far

as possible.

The Brake System

With disc brakes prolonged braking or permanent dragging of brake

pads can overheat the brake system. This can result in a loss of braking

force, even to the point of total brake failure, provoking serious acci-

dents.

Therefore, check your riding manners and make it a habit to brake hard

and then to open the brake again, whenever the road surface and the

situation allows it. It is better to stop for a moment and let the rim cool

down rather than to risk anything.

5.1. Functioning and Wear

Actuating the hand lever on the handlebar or back-pedalling causes a

stationary brake pad to be pressed against a rotating braking surface,

and the resulting friction slows down the wheel. The rate of deceler-

ation is not only determined by the force with which the brake pad is

pressed against the braking surface, but also to a decisive degree by

the coefficient of friction, which depends on the two materials that are

rubbed against each other.

When water, dirt or oil gets in contact with one of the engaging surfac-

es, this changes the coefficient of friction. This is why brakes respond at

a slight delay and less powerfully in wet weather. This applies in par-

ticular to rim brakes.

In order to maintain their effectiveness brakes need to be checked and

readjusted from time to time.

Actuate both brakes simultaneously and bear in mind that due to the

weight transfer the front brakes can achieve a higher braking force.

With rim brakes long lasting braking or permanent dragging of the

brake pads can overheat the rim. This can affect the inner tube nega-

tively or cause the tyre to slip on the inner rim. Sudden loss of pressure

while cycling can result in a serious accident.

Danger:

The assignment of brake

lever to brake pad, e.g. left

lever acts on front brake,

can vary. Make yourself

familiar with the lever-to-

brake assignment or ask

your STEVENS dealer to

change the brakes as you

want them.

Danger:

Actuate the brakes care-

fully when riding on wet or

slippery roads or off-road,

as the tyres can easily slip

away. Therefore, reduce

your speed in general when

riding in such conditions.

Danger: Be careful while getting used to the brakes.

Practise emergency stops in a place clear of traffic

until you are comfortable controlling your bicycle. This can save you from

having accidents.

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