Bedienungsanleitung Marin Bikes (Seite 45 von 54) (Englisch)

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 Corrosive environment (wet, salt air, winter road salt, accumulated

sweat)

 Presence of abrasive mud, dirt, sand, soil in riding environment

Factors that lengthen product life:

 Smooth, uid riding style

 No “hits”, crashes, jumps, other “shots” to the bike

 Low mileage

 Lower body weight

 Less aggressive rider

 Non-corrosive environment (dry, salt-free air)

 Clean riding environment

WARNING: Do not ride a bicycle or component with any crack,

bulge or dent, even a small one. Riding a cracked frame, fork or

compo nent could lead to complete failure, with risk of serious

injury or death.

B. Understanding composites

All riders must understand a fundamental reality of composites. Composite

materials constructed of carbon bers are strong and light, but when

crashed or overloaded, carbon bers do not bend, they break.

What Are Composites?

The term “composites” refers to the fact that a part or parts are made up

of different components or materials. You’ve heard the term “carbon ber

bike.” This really means “composite bike.”

Carbon ber composites are typically a strong, light ber in a matrix of

plastic, molded to form a shape. Carbon composites are light relative to

metals. Steel weighs 7.8 grams/cm3 (grams per cubic centimeter), titanium

4.5 grams/cm3, aluminum 2.75 grams/cm3. Contrast these numbers with

What to look for (continued):

• SOME CRACKS (particularly larger ones)

MAY MAKE CREAKING NOISE AS YOU

RIDE.

Think about such a noise as a serious warning

signal. Note that a well-maintained bicycle will

be very quiet and free of creaks and squeaks.

SIMPLE RULE 5 :

Investigate and nd

the source of any

noise. It may not a be

a crack, but whatever

is causing the noise

should be xed

promptly.

In most cases a fatigue crack is not a defect. It is a sign that the part has

been worn out, a sign the part has reached the end of its useful life. When

your car tires wear down to the point that the tread bars are contacting the

road, those tires are not defective. Those tires are worn out and the tread

bar says “time for replacement.” When a metal part shows a fatigue crack, it

is worn out. The crack says “time for replacement.”

Fatigue Is Not A Perfectly Predictable Science

Fatigue is not a perfectly predictable science, but here are some general

factors to help you and your dealer determine how often your bicycle should

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

frequent your need to inspect. The more you t the “lengthen product life”

prole, the less frequent your need to inspect.

Factors that shorten product life:

 Hard, harsh riding style

 “Hits”, crashes, jumps, other “shots” to the bike

 High mileage

 Higher body weight

 Stronger, more t, more aggressive rider

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Marin Bikes Seite 45

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