What causes the rear deraillieur to do this?

BlueNGT
BlueNGT Posts: 119
edited April 2018 in Workshop
I fitted eTap to my bike earlier this year but got fed up with trying to solve it and have been riding my other bike since. Now the weather has arrived I want to get out on this bike but this puzzles me.

I'm no mechanic, why would the rear derailleur do this?

https://www.youtube.com/watch?v=2LlCKCJxHhc

Any help very welcome :?

Comments

  • timothyw
    timothyw Posts: 2,482
    Sticky link in the chain? Look for one that won't bend.
  • slowbike
    slowbike Posts: 8,498
    yup - it'll move forward when the effective chain length shortens.
    If you didn't use a quicklink to join the chain then I'd guess it's the pin where you've fitted it - just nudge it back out a fraction and it'll remove the pinch on the link.
  • BlueNGT
    BlueNGT Posts: 119
    Thanks :lol:

    Its a KMC chain so defo a quicklink.

    Chain is brand new....I could give it a clean too as the lube on it quick thick.
  • BlueNGT
    BlueNGT Posts: 119
    Just checked and the Quicklink wasn't engaged properly....now in place and no skip of rear mech 8)

    Many thanks :D
  • grenw
    grenw Posts: 804
    Don't clean off the thick lube. That's good for a couple of hundred dry miles.
  • Andymaxy
    Andymaxy Posts: 197
    GrenW wrote:
    Don't clean off the thick lube. That's good for a couple of hundred dry miles.

    Just wax your chain, saves time and money. The best part you never have to clean the chain.

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