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If the chain of your bicycle falls off at the largest COG/sprocket or the chain is having problems remaining on the correct
gear, you may need to adjust your derailleur. There are a multiple ways to adjust your derailleur but for a simple
adjustment on the changing of gears, follow these instructions.
Located at the shifter, the adjusting knob where the cable enters the shifter will adjust gear shifting. This knob allows the
loosening or tightening of the cable. Rotate this knob clockwise or counterclockwise until the derailleur is properly
changing gears. This is a quick fix but for a correct adjustment, the permanent adjustment should be at the derailleur
cable locking plate and fixing bolt with the shifter knob used for fine tuning.
For a more detailed adjustment of the derailleur, you should bring your bicycle to an authorized Prodeco dealer or a
neighborhood bike shop who services SRAM derailleurs. There is also a SRAM derailleur guide included with your bike.
Derailleur Troubleshooting
Problem
Cause
Remedy
Chain jumps from smallest
sprocket to frame dropout.
High gear limit screw is not
adjusted properly.
Turn in "screw H" until the guide pullet is
aligned with the smallest sprocket.
Difficult or impossible to shift
chain onto smallest sprocket.
High gear limit screw is not
adjusted properly.
Unscrew "screw H" until the guide pullet is
aligned with the smallest sprocket.
Chain jumps over largest sprocket
and falls between the spokes and
largest sprockets or inner cage
plate scrapes on spokes.
Low gear limit screw is not
adjusted properly.
Turn in "screw L" until the guide pullet is
aligned with the largest sprocket.
Rear derailleur or derailleur
hanger is bent.
Straighten or replace.
Delayed shifting.
Clearance between guide pulley / sprocket is too large.
Adjust 'b-adjust screw" by rotating counterclockwise.
Rough shifting behavior.
Clearance between guide
pulley / sprocket is too small. Adjust 'b-adjust screw" by rotating clockwise.
Shifts more gears onto smaller
sprockets than intended.
Shift cable insufficiently
tensioned.
Turn barrel adjuster on the shifter
counterclockwise.
Delayed shifting onto larger
sprocket.
Shift cable insufficiently
tensioned.
Turn barrel adjuster on the shifter
counterclockwise.
Delayed shifting onto smaller
sprocket.
Shift cable is too tight.
Turn barrel adjuster on the shifter clockwise.
Excessive cable friction,
pinch or poorly routed cable.
Lubricate or replace cable & housing. Check
for excessive bending of cable housing.
f)
Wheel check
From time to time you should check the truing of your wheel and the condition of your spokes. Your spokes can become loose
over a period of time, especially if your wheel needs truing. The easiest way to check the truing of your wheels is as follows:
Make sure the battery is turned off and the key is out of the ignition.
It is best to turn the bicycle upside down and place it on a blanket to avoid scratching the handlebar controls
or saddle. When turning the bicycle upside down, rest the bicycle on the handlebar and saddle. If you prefer
not turning the bicycle upside down you will need to pick up the wheel off the ground to test.
Pick up the front of the bicycle by the handlebar and spin the wheel, the wheel should spin straight. If the
wheel wobbles from side to side more than 1/8‖, the wheel should be trued. Truing is required to be
performed by a person familiar with truing. Bring your bicycle to your local bicycle shop to true the wheel. To
check the rear wheel, pick up the back of the bicycle by the frame and repeat the step above.
To check for spoke tension, this can be done by squeezing 2 parallel spokes together. The spokes should be
tight and you should not be able to bend the spokes. If the spokes bend and feel lose, it is important to bring
the bicycle to your local bicycle shop and ask for them to tighten the spokes and true the wheel.
WARNING:
When placing your hands near the wheels of your bicycle, you must confirm the key has
been removed from the battery and the battery is removed from the bicycle. If the motor powers while your
hands are near the wheels, you could become seriously injured.
SHIFTING ADJUSTMENT
Check that the chain and the rear
derailleur are in the smallest cog
position.
While pedaling, twist the shifter
up one detent.
If the chain hesitates or does not
shift to the second cog, increase
the cable tension by turning the
shifting adjustment knob counter
clockwise.
If the chain shifts beyond the second cog, decrease the cable
tension by turning the shifting adjustment knob clockwise.
Repeat the two former steps until shifting and cable tension is
accurate.
While turning the crank, shift the chain up and down the cassette
several times to ensure your derailleur is shifting smoothly.
