67
Problem
Possible Reason
Possible Solution
Grinding noise when
Pedal bearings too tight
Adjust bearings
pedalling
Bottom bracket bearings too
tight
Adjust bearings
Chain fouling derailleurs
Adjust chain line
Derailleur jockey wheels
dirty/binding
Clean and oil jockey wheels
Chain jumping off
Chainring out of true
Re-true if possible, or replace
chainwheel sprocket
Chainring loose
Secure mounting bolts
or chainring
Chainring teeth bent or
broken
Repair or replace chainring/
set
Rear to front derailleur
side-to-side travel out of
adjustment
Alter derailleur travel
Freewheel does not
freewheel
Freewheel internal pawl pins
are jammed
Lubricate. If problem
persists, replace freewheel
Incorrect gear shifting
Derailleur cables sticking/
stretched/damaged
Lubricate/tighten/replace
cables
Front or rear derailleur not
adjusted properly
Alter derailleurs
Indexed shifting not adjusted
properly
Alter indexing
Steering not accurate
Wheels not aligned in frame Align wheels correctly
Headset loose or binding
Adjust/secure headset
Front forks or frame bent
Consult bicycle mechanic for
frame realignment
Knocking from rear end of
Broken suspension mount
repair/replace frame
suspension model
Worn suspension bushing
Replace worn components
Suspension dampers binding Loss of internal fluid
Lubricate as necessary
Internal rust
Disassemble damper and
replace affected parts
Damaged internal parts
Consult professional bicycle
mechanic
APOM0312
Apollo Bicycle Company Pty. Ltd. ABN: 60 001 914 469