Bedienungsanleitung Kona 2016 (Seite 22 von 23) (Englisch)

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KONA OWNER’S MANUAL

Carbon ber composites are not ductile. Once a carbon

structure is overloaded, it will not bend; it will break. At

and near the break, there will be rough, sharp edges and

maybe delamination of carbon ber or carbon ber fabric

layers. There will be no bending, buckling, or stretching.

If You Hit Something Or Have A Crash, What Can

You Expect From Your Carbon Fiber Bike?

Let’s say you hit a curb, ditch, rock, car, other cyclist or

other object. At any speed above a fast walk, your body

will continue to move forward, the momentum carrying

you over the front of the bike. You cannot and will not stay

on the bike and what happens to the frame fork and other

components is irrelevant to what happens to your body

What should you expect from your carbon frame? It

depends on many complex factors, which is why we tell

you that crash worthiness cannot be a design criteria.

With that important note, we can tell you that if the impact

is hard enough, the fork or frame may be completely

broken. Note the signicant difference in behavior between

carbon and metal. See Section 2. A, Understanding metals

in this Appendix. Even if the carbon frame was twice

as strong as a metal frame, once the carbon frame is

overloaded it will not bend, it will break completely.

Inspection of Composite Frame, Fork, & Components

Cracks: Inspect for cracks, broken, or splintered areas.

Any crack is serious. Do not ride any bicycle or compo-

nent that has a crack of any size.

Delamination: Delamination is serious damage.

Composites are made from layers of fabric. Delamination

means that the layers of fabric are no longer bonded

together.

Do not ride any bicycle or component that has any

delamination. These are some delamination clues:

•

A cloudy or white area. This kind of area looks different

the more you must question the use of super light

components. The more you t the “lengthen product

life” prole, the more likely it is that lighter components

may be suitable for you. Discuss your needs and your

prole very honestly with your dealer. Take these choices

seriously and understand that you are responsible for the

changes.

A useful slogan to discuss with your dealer if you contemplate

changing components is “Strong, Light, Cheap — pick two.”

Original Equipment components

Bicycle and component manufacturers tests the fatigue

life of the components that are original equipment on

your bike. This means that they have met test criteria and

have reasonable fatigue life. It does not mean that the

original components will last forever. They won’t.

from the ordinary undamaged areas. Undamaged areas

will look glassy, shiny, or “deep,” as if one was looking

into a clear liquid. Delaminated areas will look opaque

and cloudy

• Bulging or deformed shape. If delamination occurs, the

surface shape may change. The surface may have a

bump, a bulge, soft spot, or not be smooth and fair.

• A difference in sound when tapping the surface. If you

gently tap the surface of an undamaged composite

you will hear a consistent sound, usually a hard, sharp

sound. If you then tap a delaminated area, you will hear

a different sound, usually duller, less sharp.

Unusual Noises: Either a crack or delamination can

cause creaking noises while riding. Think about such

a noise as a serious warning signal. A well maintained

bicycle will be very quiet and free of creaks and squeaks.

Investigate and nd the source of any noise. It may not

be a crack or delamination, but whatever is causing the

noise must be xed before riding.

WARNING: Do not ride a bicycle or component with

any delamination or crack. Riding a delaminated or

cracked frame, fork or other component could lead to

complete failure, with risk of serious injury or death.

C) UNDERSTANDING COMPONENTS

It is often necessary to remove and disassemble

components in order to properly and carefully inspect

them. This is a job for a professional bicycle mechanic

with the special tools, skills and experience to inspect and

service today’s high-tech high-performance bicycles and

their components

Aftermarket “Super Light” components

Think carefully about your rider prole as outlined above.

The more you t the “shorten product life” prole,

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