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PART 2
2. Understanding Composites (Carbon Fiber)
Section D. Inspect For Safety
Cannondale Bicycle Owner’s Manual
Composite Frame, Fork, and Component
Inspection
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. These are some delamination
clues:
A cloudy or white area. This kind of area
looks dierent 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 dierence 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 dierent 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 frame or fork with any
delamination or crack. If you ride a
delaminated or cracked frame/fork/
component it may completely break
apart with risk of accident, serious
injury, paralysis or death.
139


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