108
Problem Possible Cause Possible solution
When applying the
brakes
they squeal/squeak
• Brake blocks worn down
• Brake block toe-in incorrect
• Brake blocks/rim dirty or wet
• Brake arms loose
• Replace blocks
• Correct block toe-in
• Clean blocks and rim
• Tighten mounting bolts
Knocking or
shuddering when
Applying brakes
• Bulge in the rim or rim out of true
• Brake mounting bolts loose
• Brakes out of adjustment
• Fork loose in head tube
• True wheel or take to a bike shop
for repair
• Tighten bolts
• Centre brakes and/or adjust brake
block
• Toe-in
• Tighten headset
Wobbling wheel
• Axle broken
• Wheel out of true
• Hub comes loose
• Headset binding
• Hub bearings collapsed
• QR mechanism loose
• Replace axle
• True wheel
• Adjust hub bearings
• Adjust headset
• Replace bearings
• Adjust QR mechanism
Steering not
accurate
• Wheels not aligned in frame
• Headset loose or binding
• Front forks or frame bent
• Align wheels correctly
• Adjust /tighten headset
• Take bike to a bike shop for
possible frame realignment
Frequent punctures
• Inner tube old or faulty
• Tire thread/casing worn
• Tire unsuited to rim
• Tire not checked after previous
puncture
• Tire pressure too low
• Spoke protruding into rim
• Replace inner tube
• Replace tire
• Replace with correct tire
• Remove sharp object embedded
in tire
• Correct tire pressure
• File down spoke
Bicycle has reduced
range
And/or speed
• Low batteries
• Faulty or old batteries
• Low tire pressure
• Brakes dragging against rim
• Riding in hilly terrain, headwind,
etc.
• Charge batteries for
recommended time
• Replace batteries
• Inflate tires to recommended
pressure
• Adjust brakes and/or rim
• Reduced range to be expected in
these
• Types of terrain and/or weather
conditions
Hub motor makes a
“clicking” noise and
has reduce power
and/or shuts off
• Low batteries
• Damaged planetary gears
• Charge batteries for
recommended time
• Replace hub motor/wheel
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