Remove the springs from the the worn out pads and fit them onto the new pads. Replace the
new pads, keeping them slightly inclined, into the seat of the Calliper. Check that the spring
hooks correctly onto the small piston. (When pulling downwards the pads should not come out).
Refit the Calliper to the fork or frame and adjust screw C (Fig. 3) until the pads and the disc are
centered and the wheel spins freely. (Again there may be some noise from the brake until it “beds
E
Fig.6
Fig.7
DERAILLEUR GEARS INTRODUCTION
The derailleur gear is so named because it works on the derailing principle to move the chain
from one sprocket to another. The number of gears is determined by multiplying the number of
sprockets on the rear freewheel by the number of chainrings on the front crank set.
By using different combinations of sprocket and chainwheel sizes, a wide range of gear ratios are
available. The highest gear is when the large chainwheel is coupled with the small sprocket and
the lowest gear is when the small chainwheel is combined with the largest rear sprocket.
The wide range of gears allows you to combat all prevailing conditions while pedalling at the
constant and efficient rate of sixty revolutions per minute.
DERAILLEUR GEAR MAINTENANCE
To help ensure that your derailleur gear works efficiently and to prolong its life, it must be kept
clean and free from excess dirt build up and should be properly lubricated.
GEAR CHANGING
The riderʼs left gear lever controls the front derailleur and chain wheels.
The right gear lever controls the rear derailleur and sprockets.
The large rear sprockets generate low gears for hill climbing. The small rear sprockets develop
high gear ratios for speed work and downhill riding.
The small front chainring produces low gear ratios while the larger front chainrings produce
higher gear ratios.
To operate your derailleur gear system efficiently and reduce damage, wear and reduce noise to
a minimum, avoid using the maximum crossover gear ratios of large chainring/large rear sprocket,
small chainring/small rear sprocket.
CAUTION:
For positive gear selection, observe these four precautions:
1
. Change only when pedals and wheels are moving in a forward motion.
2
. Reduce pedal pressure while changing gears.
3
. Never back pedal when changing gear.
4
. Never force the gear levers.
Gear selection should be made in anticipation of need since forward motion of the bicycle is
required when changing gear. It is advisable to change to a low gear before stopping in order to
be in the proper gear when you start up. On hills, change gear early while still maintaining forward
pedalling speed.
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