Care And Maintenance Of The Bicycle - Kalkhoff Derby Instruction Manual

Handling carbon components
Carbon is a special material that requires special treatment and care during assembly,
maintenance, riding, transport and storage of the bicycle.
Properties
Carbon parts must not be deformed, dented or bent following an accident/fall. The
appearance does not change, even though the interior fibres may be torn. You should
therefore subject the carbon frame and all other carbon components to an intensive
examination following a fall or if the bicycle falls over.
Torques
Some carbon components require lower tightening torques. Excess torques can lead to
hidden damage which is not visible from outside. The frame or other components may
break or be altered to the extent that you may fall. Therefore always observe the
manufacturer's specifications attached or consult a dealer.
Visual check
A previously damaged attached carbon part may suddenly fail without warning. This
could lead to injury or even death. Therefore, check your carbon frame and attached
carbon parts regularly.
Look for splintering, deep scratches, holes or other changes to the carbon surface.
Check whether any parts feel softer or less hard than usual.
Check whether any individual layers (paint, finish or fibres) are peeling off.
If you are suspicious that a part may no longer be in order, be sure to replace it before
riding the bicycle. Better still, take your bicycle to a dealer for inspection.
Check the following parts and areas regularly (at least every 100 km) for cracks,
breakage or surface changes and always check these parts following a fall or if the
bicycle falls over:
Carbon frame
Derailleur clamping area, shifter eyes, saddle clamp, headset shell, bottom bracket
shell, socket or disc brake receptacle, dropout slot, suspension element receptacles
on the handlebar stem and chainstay, bearing receptacles on suspension frames,
transitional areas around drinking bottle holders.
Recutting the thread and the bearing shells or rubbing out the seat
tube are not allowed. It is not permitted to mount a child seat on
a carbon frame – there is a risk that the frame could break.
Carbon handlebar
Transitional area around the handlebar stem, grips, clamping areas of other
attached parts.
If your bicycle has fallen over onto the handlebar, it is best to have
it replaced by a dealer. Bar-ends should only be fitted by a dealer.
Carbon wheels
Wear of the surface and brake blocks, wheel hub and flanks.
Please note that only approved brake blocks may be used.
Carbon fork
Fork sheaths at the fork head, fork head under the conical ring, clamping
area of the A-head, stem inside and out.
If you have changed the handlebar position, remember that the stem
must enclose the carbon part extensively.
Carbon handlebar stem
Screws in the clamping area, fork shaft inside and out.
If you have changed the handlebar stem, remember that the stem must
enclose the carbon part extensively.
Carbon seat support
Area of transition from saddle support to seat tube, area of transition to the
head of the saddle support.
If any other parts of your bicycle are made of carbon, check them regularly for
cracks, breakages or surface changes.
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