Problem with Rear Derailleur
09-08-14, 12:21 PM
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Problem with Rear Derailleur
My Mountain bike was working perfectly last week. I went for a ride at the weekend and the rear derailleur has developed a problem. There is no spring in the derailleur. The lowest jockey wheel has moved towards the crank and the chain is sagging, previously the lowest jockey was properly inline with the upper jockey wheel. The cable is still in the same position as it was when the derailleur was working correctly. Feedback appreciated as I need to go for a ride.
09-08-14, 01:16 PM
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Pictures would help, as would knowing what type of derailleur it is. Sounds like the spring could have broken in the derailleur body, you could try making sure that it is good and clean. Try pushing it by hand and seeing if there is any spring tension fighting you.
09-08-14, 01:27 PM
#3
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Was any type of maintenance done, the derailleur or wheel removed, or did you have any type of incident while riding just before the problem arose? It can feel like the spring is broken if the derailleur was allowed to rotate or was reinstalled so that it is not sprung against the stop on the hanger.
Last edited by cny-bikeman; 09-08-14 at 01:34 PM.
09-08-14, 01:37 PM
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Last edited by Robbo2015; 09-08-14 at 01:44 PM.
09-08-14, 01:46 PM
#6
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Time for a new RD.
09-09-14, 12:15 AM
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Was any type of maintenance done, the derailleur or wheel removed, or did you have any type of incident while riding just before the problem arose? It can feel like the spring is broken if the derailleur was allowed to rotate or was reinstalled so that it is not sprung against the stop on the hanger.
09-09-14, 06:10 AM
#9
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OK, thank you for clarification. It would seem then that the spring is the logical culprit.
09-09-14, 07:22 AM
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Yes looking in the window of the RD you should see a short what some people call a "screen door" type spring. Your LBS might have one they kept from a bent or broken RD.
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