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InstructIon Manual
Derailleur Systems
The derailleur system comprises the front and rear derailleur, the shift levers, and the derailleur
control cables, all of which must function correctly for smooth gear shifting to occur. there are
several different types of derailleur systems but all operate using similar principles. Your new
bicycle may be fitted with a standard “friction” type system where you will need to feel each gear
shift into position. It may be fitted with an “index” system (e.g. SIS), which links each different gear
position to a positive click mechanism in the shifter, and makes shifting very simple and precise. A
further development of SIS is the fully integrated system (e.g. STI) where the shift lever and brake
lever mechanisms form an integrated unit with the system allowing both gear shifting and braking
to occur at the same time. More detailed information on installation and lubrication of specific
systems should be supplied with your bike, otherwise please refer to a specialist bicycle mechanic.
Inspection
The operation of the derailleur system should be checked at least every month. Check the
operation of the rear derailleur first, then the front. the rear derailleur should shift the chain
cleanly from one cog to the next without hesitation. On SIS equipped bicycles, each notched
position in the shifter must equate to a new gear position. After shifting, the rear derailleur should
not rub on the chain. The derailleur should never cause the chain to fall off the inner or outer
freewheel cogs.
the front derailleur should also shift the chain cleanly and without hesitation between each
chainring. If your bicycle is equipped with front SIS, then each click or stop in the shifter should
equate exactly to a new gear position. When the chain
has been positioned onto a new chain ring, it should not rub on the front derailleur. the chain
should not fall off a chainring at any time.
Derailleur control cables are a critical component that must be well maintained for accurate
Detailed maintenance
Pre-stretch the derailleur
cables to remove slack
Stretch
Содержание Adult Bicycles
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