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I have this horrible squeaky noise coming from my rear deraileur area. It only happens when I pedal. Watch below for the video.

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  • Looks clean and tidy - what do you oil the chain with and how often?
    – Swifty
    Apr 21, 2020 at 6:49
  • I use dry muck off lube, it works pretty well
    – Nicksamios
    Apr 21, 2020 at 7:00
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    I think this is coming from the pulley wheels. You could take them off and lube/grease them or pour lube into/over the silver washer/dustcup thing and hope it penetrates far enough.
    – Michael
    Apr 21, 2020 at 7:33
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    @Michael I'd be cautious about just pouring lube into the area. Lubricant does attract dirt and grime, which then forms a grinding paste for the chain. Better to remove the jockey wheels and clean under the dust covers, then lubricate directly.
    – Weiwen Ng
    Apr 21, 2020 at 16:01
  • @WeiwenNg: Of course it’s always a good idea to wipe off the excess.
    – Michael
    Apr 21, 2020 at 18:53

3 Answers 3

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Sounds like jockey wheel squeak to me.

Although keeping your bike clean is generally a good thing, it does have some negative side effects like washing away grease and lubrication on your moving parts.

As part of your regular maintenance tasks you should be periodically replacing the lost/contaminated lubrication from your moving parts, in this case, likely to be your jockey wheels. Here is a GCN Video on how to service your jockey wheels

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Clean and lube the chain. If that does not work service the jockey wheels.

Here's Park Tools page for derailleur service: https://www.parktool.com/blog/repair-help/rear-derailleur-overhaul

If/when you do take the jockey wheels out, keep track of which is the top and bottom wheel and which way around they go. The top and bottom wheels are different and some derailleur's wheels have a direction of rotation.

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  • Should I use lithium Grease?
    – Nicksamios
    Apr 21, 2020 at 22:19
  • @Nicksamios No, use a light lube like the Park Tool article says
    – Argenti Apparatus
    Apr 22, 2020 at 0:24
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I cleaned the chain today with the Park tool CM 52. It fixed the squeaky noise, not sure how a dirty chain caused that noise.

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  • 1
    When it rains, the squeak on my garden gate goes away
    – Swifty
    Apr 27, 2020 at 10:27
  • Yes, water is a lubricant. The trouble is that it dries quickly and can cause rusting of ferrous parts.
    – James Bradbury
    Jun 30 at 14:34

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