Bedienungsanleitung Scott Road Bikes - 2017 (Seite 25 von 64) (Englisch)

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ROAD BIKE | OWNER’S MANUAL 2017OWNER’S MANUAL 2017 | ROAD BIKE

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Functional check

Test the brakes in stationary (d) by firmly pulling the brake levers towards the

handlebars. The brake pads of rim brakes must hit the rim evenly with their

entire surface without touching the tyre during braking, in open condition or in

between.

Check whether the brake pads are accurately aligned with the rims. Are the

brake pads still sufficiently thick? You can judge the wear of the brake pads

by the appearance of grooves. If the pads are worn down to the bottom of the

grooves, it is time to replace them. Be sure to observe the appropriate instruc-

tions of the respective manufacturer.

The brake levers must always remain clear of the handlebars. You should not

even be able to pull them all the way to the handlebars in the event of an emer-

gency stop. If this is the case, however, observe the following chapter “Synchro-

nising and readjusting”.

See your SCOTT dealer and ask them to examine the remaining thickness of the

rims when you have worn through your second set of brake pads at the latest.

Your SCOTT dealer has special measuring devices for determining the remain-

ing thickness of the rims. The brake pads must hit the rim simultaneously, first

touching it with the front portion of their surface. At the moment of first contact

the rear portion of the pads should be a millimetre away from the braking sur-

face. Viewed from the top the brake pads form a “V“ with the trough pointing

to the front (e). This setting is to prevent the brake pads from screeching when

applied. A correctly adjusted brake is only ensured if all of these checks have

been made successfully.

DANGER!

Brake cables which are damaged, e.g. frayed, must be replaced immediate-

ly, as they can otherwise fail in a critical moment, possibly causing a crash!

DANGER!

Adjusting the position of the brake pads relative to the rims (f) requires a

considerable degree of skill. Replacing and adjusting the brake pads is a job

best left to your SCOTT dealer.

DANGER!

Have your rims regularly inspected and measured by your SCOTT dealer.

With an unapplied brake the brake pads should not be too close to the rim

sides, otherwise they could drag along the rim during riding. Before making this

adjustment, observe the notes in the chapter “Brake lever reach adjustment on

SCOTT road bikes and SCOTT cyclo-cross bikes”.

With ongoing brake pad wear, the pressure point at the brake lever moves to-

wards the handlebars. Check the free travel at regular intervals; it should not be

longer than a quarter of the whole travel. For readjustment turn the knurled nut

or bolt (a) through which the cable runs into the brake body until the lever has

the desired travel. Test the brakes subsequently in a place free of traffic.

DANGER!

Always test the brakes’ function when stationary after adjusting them, mak-

ing sure the brake pads engage fully with the rim without touching the tyre

when you pull them hard. Make sure you cannot pull the lever all the way to the

handlebars.

Cross/Cantilever brakes

Some SCOTT cyclo-cross bikes have cantilever brakes (b) which provide wider

clearance for muddy tyres and are sometimes fitted with additional brake levers

also allowing braking from the upper part of the handlebars.

Operation and wear

Cantilever brake designs have two brake arms mounted separately on either

side of the rim. When actuating the brake lever, both arms are pressed together

by the cable, the pads touching the rim. and the ensuing friction slows down the

wheel. If water, dirt or oil come into contact with one of the braking surfaces,

this changes the coefficient of friction and deceleration is reduced. This is why

brakes respond with a slight delay and less powerfully in wet weather. In order

to maintain their effectiveness, brakes need to be checked and readjusted regu-

larly (c).

The friction generated by braking causes wear to the brake pads as well as to

the rims. Frequent rides in the rain and dirt and over hilly terrain can accelerate

wear on both braking surfaces. Some rims are provided with wear indicators,

e.g. grooves or circular indentations. If the rim is worn down to the point where

the grooves or indentations are no longer visible, they need to be replaced.

Once the abrasion of the rim has reached a certain critical point, the rim may

break under the tyre pressure. This can make the wheel jam or the inner tube

burst, both of which can cause an accident. Risk of falling!

b ca e fd

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