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I made a video of it so hopefully someone will watch it and help me out.

Andy P
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Ablang
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  • Does it do it when turning the cranks by hand with the rear wheel off the ground -> no load on the system. Do you do regular maintenance? You said it was 10 speed, does it still make the noise in the smaller front chainring? – Andy P Apr 23 '22 at 22:22

1 Answers1

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We can hear that it graunches in-time with your pedal strokes and as you noted, stops when coasting. This eliminates anything in the rear wheel as a cause.

The sound is "dry tortured metal" and not a click or a squeak.

I suspect it is one of:

  • Bottom bracket bearings have run out of grease. This is my prime thought. The cranks may have sideways/lateral motion that shouldn't exist. What happens if you pedal backward?
  • Pedal axle bearings have run out of grease on one side - test by free-spinning each pedal and see if they do several turns under their own momentum.
  • Crusty dry chain, either by itself or dragging through the front derailleur cage.
  • Dirty rear hub/freewheel area - though this would cause slippage rather than the friction increases described. Unlikely.
Criggie
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