PROBLEM
Brakes not working effectively
When applying the brakes they squeal squeak
Knocking or shuddering when applying brakes
Wobbling wheel
Steering not accurate
Frequent punctures
POSSIBLE CAUSE
• Brake blocks worn down
• Brake blocks/rim greasy, wet or dirty
• Brake cables are binding/stretched/damaged
• Brake levers are binding
• Brakes out of adjustment
• Brake blocks worn down
• Brake block toe-in incorrect
• Brake blocks/rim dirty or wet
• Brake arms loose
• Bulge in the rim or rim out of true
• Brake mounting bolts loose
• Brakes out of adjustment
• Fork loose in head tube
• Axle broken
• Wheel out of true
• Hub comes loose
• Headset binding
• Hub bearings collapsed
• QR mechanism loose
• Wheels not aligned in frame
• Headset loose or binding
• Front forks or frame bent
• Inner tube old or faulty
• Tire tread/casing worn
• Tire unsuited to rim
• Tire not checked after previous puncture
• Tire pressure too low
• Spoke protruding into rim
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REMEDY
• Replace brake blocks
• Clean blocks and rim
• Clean/adjust/replace cables
• Adjust brake levers
• Center brakes
• Replace blocks
• Correct block toe-in
• Clean blocks and rim
• Tighten mounting bolts
• True wheel or take to a bike shop for
repair
• Tighten bolts
• Center brakes and/or adjust brake block
toe-in
• Tighten headset
• Replace axle
• True wheel
• Adjust hub bearings
• Adjust headset
• Replace bearings
• Adjust OR mechanism
• Align wheels correctly
• Adjust/tighten headset
• Take bike to a bike shop for possible
frame realignment
• Replace Inner tube
• Replace tire
• Replace with correct tire
• Remove sharp object embedded in tire
• Correct tire pressure
• File down spoke