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

New: Take part in the July Giveaway for a brand new 26" Thruster® Street Style BMX Cruiser Bicycle

New product launch: WIN an innovative aeroe Spider Rear Rack


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
Dork disc - remove it or keep it?
Today 12:59 PM
Creaky crank with play and loosening
Today 11:21 AM
Post a photo for aeroe Spider Rear Rack
Today 10:45 AM
26" Thruster® Street Style BMX | July 20...
Today 08:23 AM
2020 road cycling season
Today 07:18 AM
FD cable pull on opposite side of frame
Today 04:18 AM
60s Viner Repainted..?
Yesterday 06:23 PM
budget speedometer
Yesterday 10:44 AM
Pinging noise fixed
Yesterday 08:08 AM
Need advice on Bike Rack
Yesterday 02:07 AM

[-]
Top 5 Posters This Month
no avatar 1. Jesper
73 posts
no avatar 2. CharleyFarley
21 posts
no avatar 3. Painkiller
15 posts
no avatar 4. Papa Dom
10 posts
no avatar 5. G_M
8 posts