Have questions or want to discuss cycling? Join Now or Sign In to participate in the BikeRide community.

New: Take Part in the March Giveaway: Coming Soon 3/24


How can a rear derailleur cause chain slip?
#1
I have a Diamondback hardtail that I've been slowly upgrading ever since I got it. Lately my project has been to upgrade the drivetrain, so I did. I did everything except the rear derailleur. In doing so, I was expecting my chain-slip problem to go away, but it did not.

I replaced:

Shift cable
Cable housing
Cassette
Chain
Chainrings
Crankset

I also had the hanger checked for straightness and it was fine. I also made sure the rear derailleur was adjusted properly, along with the H/L limit screws and the B tension. Everything was good, and the bike shop confirmed the settings were good. Yet still I had chain slip problems. I had zero issues with shifting, it was just regular chain slip. I'd be in my driveway and torque down and sometimes it would skip.

Then I replaced the rear derailleur with a higher quality one. Blam. Problem fixed.

But, HOW. How can a rear derailleur cause chain skip problems? I can understand SHIFTING problems, but how can a stationary rear derailleur on flat ground cause a slip?
  Reply
#2
Quote:But, HOW. How can a rear derailleur cause chain skip problems? I can understand SHIFTING problems, but how can a stationary rear derailleur on flat ground cause a slip?

If a derailleur gets really worn and sloppy, the jockey wheel cage can sit at an angle, rather than vertical, when viewed from the rear of the bicycle. This means that the chain has to curve from the angled upper jockey wheel onto the vertical cassette sprocket and can cause it to skip. That's not to say that's definitely what it was, but it's a possibility.
  Reply


Possibly Related Threads...

Forum Jump:

[-]
10 Latest Posts
Santini fluted frame
Today 01:39 PM
Expensive bikes with crappy wheels
Today 10:15 AM
Where are you from and What is your favo...
Yesterday 11:43 PM
2007 Trek Pilot S.P.A. 5.2
Yesterday 07:06 PM
2010 Specialized Hardrock
03-26-2024 09:16 PM
1990 Specialized Rockhopper How to Fluff...
03-25-2024 07:05 PM
Thread busted on right pedal crank
03-24-2024 08:52 PM
Trek domane tyre
03-24-2024 05:48 PM
Modern rims crack at spoke holes
03-24-2024 05:32 PM
Cup & Cone — Simple & Durable or PITA & ...
03-24-2024 04:53 PM

[-]
Join BikeRide on Strava
Feel free to join if you are on Strava: www.strava.com/clubs/bikeridecom

[-]
Top 5 Posters This Month
no avatar 1. Painkiller
21 posts
no avatar 2. ReapThaWhirlwind
16 posts
no avatar 3. Jesper
16 posts
no avatar 4. GirishH
15 posts
no avatar 5. meamoantonio
15 posts