25
ADJUSTING THE REAR DERAILLEUR
The lower limit adjusting screw controls the distance
between the derailleur and the rear wheel, while the
upper limit adjusting screw determines the caliper
movement in regards to the frame.
1. Shift to the biggest gear and detach the rear
derailleur cable by pulling it out of the cable
anchor bolt. Put the chain onto the smallest
sprocket-wheel.
2. Adjust the upper screw so that he chain is
aligned with the smallest sprocket-wheel.
Tighten the cable, attach it again and secure
the limit cable anchor bolt.
3. Try to shift gear to every sprocket-wheel
–
the gear shifting should be smooth and
quiet.
If an unusual noise is coming from the
derailleur, gradually turn the cable anchor bolt
clockwise to decrease the cable tension
– this
will allow for greater movement of the caliper
outwards. If you turn the cable anchor bolt
anti-clockwise, the cable tension will increase
and the caliper range of movement in the
direction of the wheel will also increase. This
way you’ll adjust the caliper position in
regards to the cassette. Turn the cable
anchor bolt in the direction you want the chain
to be moved.
4. Shift the chain to the biggest sprocket-wheel
and adjust the lower screw so that the chain
and the biggest sprocket-wheel are aligned.
If you are unable to shift the chain to the
biggest sprocket-wheel, turn the lower screw
clockwise to increase the chain range of
movement in the direction of the wheel.
5. Try out the gear shifting on every wheel
– it
should be smooth and quiet.
NOTE:
It is possible
you’ll need to repeat the
above steps.
Back view
Side view
CHAIN
The chain is one of the most used parts of the bike as it transfers the force from the pedal to the rear
wheel. It is very important to keep the chain clean and lubricated. Clean the chain carefully before every
lubrication. Sand and other small particles that get stuck to the chain can rapidly decrease its longevity.
Proper and regular maintenance significantly prolongs the service life of the sprocket-wheels, chainrings
and both derailleurs.
The chain tension on a bike with rear derailleur is regulated by a spring in the derailleur. If you have a
bike without a rear derailleur, you can straighten the chain by shifting the rear wheel in the fork
backwards. The chain’s range of movement between the chainring and the sprocket-wheel should not
be higher than the position of the chain.
