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Special Characteristics of Carbon
With components made of carbon (carbon-fibre-reinforced plastics), also
referred to as CRP, some characteristics have to be kept in mind.
Carbon is an extremely strong material which combines high resistance with
low weight. After overstress, however, carbon components, unlike metal parts,
do not necessarily show durable or visible deformation even though some of the
fibres may be damaged.
Danger:
Do not combine carbon
handlebars with bar
ends or and aero bar,
unless they have been
specifically approved.
Do not shorten carbon
handlebars or clamp the
brake and shift levers
more in the middle than
indicated or needed.
Risk of breakage!
Caution:
Most clamps of bicycle
carrier systems are
potential sources of
damage to large-
diameter frame tubes!
As a result thereof
carbon frames can fail
during use without pre-
vious warning. However,
there are special-
purpose models which
are suitable, available in
the car accessory trade.
Inform yourself there
or ask your STEVENS
dealer for advice.
Danger:
If carbon components on your STEVENS bicycle produce any creaking or
cracking noises or show any external sign of damage, such as gouges,
cracks, dents, discolourations etc., do not use the STEVENS bicycle any
longer. Contact your STEVENS dealer immediately; they will check the
component thoroughly.
Components made of carbon should under no circumstances be exposed to
excessive heat. Therefore, never have a carbon component enamelled or pow-
der-coated. The temperatures required for doing so could destroy it. Do not leave
carbon fibre components near a source of heat or in your car during hot or sunny
weather.
When you intend to transport your STEVENS bicycle in the boot of your car,
be sure to protect the bicycle or the carbon frame and components. Blankets,
foam tubes or the like are a suitable padding to protect the sensitive material
from damage.
Always park your STEVENS bicycle carefully and make sure it does not topple
over. Carbon frames and components may already sustain damage by simply top-
pling over and thereby hitting e.g. a sharp edge.
Caution:
Do not clamp a carbon
frame or seat post in the
holding jaws of a work-
stand! The components
may sustain damage.
Mount a sturdy (alumin-
ium) seat post instead
and use it to clamp the
frame, or choose a work
stand that holds the
frame at three points
inside the frame triangle
or which clamps the
fork and bottom bracket
shell.
Note:
Protect the exposed are-
as of your carbon frame
(e.g. the underside of
the down tube) against
rubbing cables or stone
chips with special pads
your STEVENS dealer
keeps for sale.
Note:
Carbon components have, like all lightweight bicycle components, a limited
service life. Therefore, have your handlebar and stem carefully checked
by your STEVENS dealer. In case of doubt, it’s always best to replace the
component.
Danger:
Make sure all carbon clamping areas are absolutely free of grease and
other lubricants! Grease will penetrate the surface of the carbon material,
thereby reducing the coefficient of friction. This will no longer provide reli-
able clamping within the prescribed torque values. Once greased, carbon
components may never again ensure reliable clamping! Use special carbon
assembly paste instead.
This makes it very dangerous to continue using the carbon component after an
impact or undue stress, as it may fail without previous warning thereby causing an
accident with unforeseeable consequences. For this reason we recommend that
you have the component, or to be certain, the entire STEVENS bicycle checked by
your STEVENS dealer after every incident, such as e.g. a crash.
They must be replaced at once! Prevent further use by taking appropriate
measures, i.e. saw the component into pieces. Damaged carbon frames can pos-
sibly be repaired. Contact your STEVENS dealer.
S - 34 | English English | S - 35
18


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