Bedienungsanleitung Burley Bicycle (Seite 25 von 27) (Englisch)

632563

Zoom out

Zoom in

Vorherige Seite

1/27

Nächste Seite

These are some delamination clues:

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

2. • 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.

3. • 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 ﬁnd the source of any noise. It may

not be a crack or delamination, but whatever is causing the noise must be ﬁxed 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 proﬁle as outlined above. The more you ﬁt the

“shorten product life” proﬁle, the more you must question the use of super light

components. The more you ﬁt the “lengthen product life” proﬁle, the more likely it is

that lighter components may be suitable for you. Discuss your needs and your proﬁle

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.

grams/cm

. Contrast these numbers with carbon ﬁber composite at 1.45 grams/cm

The composites with the best strength-to-weight ratios are made of carbon ﬁber in

a matrix of epoxy plastic. The epoxy matrix bonds the carbon ﬁbers together, transfers

load to other ﬁbers, and provides a smooth outer surface. The carbon ﬁbers are the

“skeleton” that carries the load.

Why Are Composites Used?

Unlike metals, which have uniform properties in all directions (engineers call this

isotropic), carbon ﬁbers can be placed in speciﬁc orientations to optimize the structure

for particular loads. The choice of where to place the carbon ﬁbers gives engineers a

powerful tool to create strong, light bicycles. Engineers may also orient ﬁbers to suit

other goals such as comfort and vibration damping.

Carbon ﬁber composites are very corrosion resistant, much more so than most

metals.

Think about carbon ﬁber or ﬁberglass boats.

Carbon ﬁber materials have a very high strength-to-weight ratio.

What Are The Limits Of Composites?

Well designed “composite” or carbon ﬁber bicycles and components have long

fatigue lives, usually better than their metal equivalents.

While fatigue life is an advantage of carbon ﬁber, you must still regularly inspect your

carbon ﬁber frame, fork, or components.

Carbon ﬁber 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 ﬁber or carbon ﬁber 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. But we can tell you that if the impact is hard enough, the fork or frame may

be completely broken. Note the signiﬁcant 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, and Components

Cracks:

Inspect for cracks, broken, or splintered areas. Any crack is serious. Do not ride

any bicycle or component 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.

Burley Bicycle Seite 25

Brauchen Sie Hilfe? Stellen Sie Ihre Frage.

Missbrauch melden von Frage und/oder Antwort

Art des Missbrauchs:

Forenregeln

Neu registrieren

Das Handbuch wird per E-Mail gesendet. Überprüfen Sie ihre E-Mail.

Ihre Frage wurde zu diesem Forum hinzugefügt

Info