Rear Derailleur

Bob K Denver · 05-12-2010, 11:11 AM

Please help me understand the rear derailleur. Does it contain one spring or two? Both the cage and the pulley are "spring loaded", I am trying to understand how this works. Thank you very much for answering.

cyclerUK · 05-12-2010, 11:42 AM

There are 3 springs in a rear derailleur.
One in the cage pivot.
One at the mounting bolt. ("B" axle)
One in between the parallelogram.

http://techdocs.shimano.com/media/techdocs/content/cycle/EV/bikecomponents/RD/EV-RD-M511-2500_v1_m56577569830609143.pdf

http://www.parktool.com/repair/readhowto.asp?id=76

Bob K Denver · 05-12-2010, 01:06 PM

(05-12-2010, 11:42 AM)cyclerUK Wrote: There are 3 springs in a rear derailleur.
One in the cage pivot.
One at the mounting bolt. ("B" axle)
One in between the parallelogram.

http://techdocs.shimano.com/media/techdocs/content/cycle/EV/bikecomponents/RD/EV-RD-M511-2500_v1_m56577569830609143.pdf

http://www.parktool.com/repair/readhowto.asp?id=76

Thank you very much.

10 Latest Posts
Should eBikers have to get an eBike lice... Yesterday 07:15 PM
How Bad Are E-bikes By You? Yesterday 07:11 PM
Our new review format – we'd like your f... Yesterday 06:59 AM
Which one should I pick? 10-21-2026 08:09 PM
Chain skips under heavy load when pedall... 10-21-2026 07:32 PM
New rider 10-21-2026 07:07 PM
Are 26" really dying out? 10-18-2026 07:38 PM
Using ChatGPT for training 10-18-2026 07:32 PM
2026 Garmin Edge 1050 - warranty 10-18-2026 09:34 AM
Catastrophic bicycle failures 10-16-2026 01:36 AM

Join BikeRide on Strava

Feel free to join if you are on Strava: www.strava.com/clubs/bikeridecom