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Rear Derailluer Issues

Old 08-05-20, 08:11 AM
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theinreich
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Rear Derailluer Issues

About 90% of the time when I stop pedaling, my rear derailleur likes to lift up, creating slack in the chain, for about half a second and then it'll go back to normal. I took it to a repair shop where I received a tune-up and had the chain and gears cleaned and oiled, yet it still does it and the guy can't figure out why. Please help. I have videos of the problem that I can send if anyone thinks they might know what the issue is and needs more information. Thank you.
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Old 08-05-20, 08:19 AM
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Probably not the derailleur. Remove your rear wheel and lay it across a trash receptacle gear cluster up. Spray WD40 or something similar into the crack by the moving part of your freewheel or free hub. My bet is that will fix it.
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Old 08-05-20, 08:19 AM
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Freewheel or freehub? I've had this happen more with freewheels and I just kept saturating them with WD-40 until they quit doing that. Unless you really understand how a freewheel is built, you'll probably not get the WD-40 or whatever you use into the right place.
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Old 08-05-20, 08:29 AM
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theinreich
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Originally Posted by Iride01 View Post
Freewheel or freehub? I've had this happen more with freewheels and I just kept saturating them with WD-40 until they quit doing that. Unless you really understand how a freewheel is built, you'll probably not get the WD-40 or whatever you use into the right place.
Researching the difference between the two, and remembering what the bike guy showed me (I'm in Korea so he doesn't speak English that well), I'm pretty sure I have a freehub wheel. It looks like the pictures I saw of freehubs on Facebook (Big black cylindrical piece that sticks out).
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Old 08-05-20, 08:31 AM
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Originally Posted by Retro Grouch View Post
Probably not the derailleur. Remove your rear wheel and lay it across a trash receptacle gear cluster up. Spray WD40 or something similar into the crack by the moving part of your freewheel or free hub. My bet is that will fix it.
I will get some WD-40 the next time I am able to make it to the store and give it a try. I really hope it works. Thanks
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Old 08-05-20, 08:49 AM
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It's hard to believe the repair shop didn't realize what was causing your problem. That's the classic symptom of a sticky freewheel or freehub body. WD-40 is OK but any light oil dribbled into the seam between the stationary inner body and the rotating outer shell while turning the gears by hand should fix the problem.
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