3

I have the dura ace 7900 front shifter and derailleur and after my shifting cables have been replaced I have noticed the following.

I cannot trim anymore. The chain jumps onto the big chainring with only 1 click. Previously I could shift into the big ring with 2 clicks.

I cannot shift into the small ring. Well I can but the chain stays on the big ring while I pedal. Only after I turn the cranks for a while the chain drops into the small ring.

I can rule out worn cables and housing since those were replaced right as this problem came up.

I have tried adjusting the cable tension with the barrel adjuster but that yielded no results.

Any ideas ?

|improve this question
  • Did you replace the cables yourself or have it done by someone else? – Swifty Oct 19 '18 at 8:18
  • 1
    I had done it at a shop, but since they charge 30 bucks for changing my bartape I wont be going back there – zython Oct 19 '18 at 8:37
  • I wont be going back there Good decision. A bike shop that can't even set up a front derailleur to shift properly? – Andrew Henle Oct 19 '18 at 11:08
  • 3
    @zython Nonetheless, you paid them to do some work for you and they haven't done that work properly. You should take your bike back (once) and get them to fix the mess they created. – David Richerby Oct 19 '18 at 12:49
  • 1
    Just clarifying - the front derailleur moves left far enough to get into the smaller chainring? Might need a minor tweak to the lower limit screw. – Criggie♦ Oct 20 '18 at 1:17
6

Sounds like you have a bit too much cable tension in your new configuration.

Usually cable tension is tuned with the barrel adjuster you mentioned, but if you cannot get the tension low enough with it, you'll need to loosen the bolt that attaches the cable to the derailleur, give the cable just a bit more slack and try again.

|improve this answer
  • yeah there was too much cable tension and the derailleur was positioned too high – zython Oct 20 '18 at 13:18

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.