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Problem
Freewheel does not rotate
Brakes not working effectively
When applying the brakes
they squeal/squeak
Knocking or shuddering when
applying brakes
Wobbling wheel
Possible Cause
-Freewheel internal pawl pins are
jammed
-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
Remedy
- Lubricate. If problem persists,
replace freewheel
-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 QR mechanism