I recently brought a second hand bike with Shimano Deore gears on it and when I switch up a gear on the chain-ring it requires a significant amount of actuation pressure on the 'flappy' paddle (almost reaches travel limit before changes).

I was wondering how I should adjust this to reduce actuation pressure?

  • 1
    You should have a knowledgeable friend or a bike shop check out the bike to see if it's basically set up right. Oct 10 '15 at 21:03
  • I'm not sure how similar the actuation methods of brifters are to indexed mountain bike shifters, but I had similar symptoms on our tandem when we got it. There was no "ratcheting" when upshifting on the front derailer, it took almost full travel to make a one-ring shift. My almost-LBS suggested flooding the shifter with a thin chain lubricant in a blue aerosol can (sorry, I don't have the can nearby) to see if solvent/carrier in the lube would free up the ratchet pawls. It worked and now I can make short strokes to shift or trim the derailer.
    – dlu
    Oct 10 '15 at 21:23
  • The stuff in the blue can is Finish Line 1-Step.
    – dlu
    Oct 12 '15 at 1:31

I'm not sure what you're comparing the effort to, but typically the front derailleur requires more cable pull to actuate, in comparison to shifting in the rear.

Adjusting Shimano Front Derailleurs
Adjusting Shimano Rear Derailleurs

It could be that you need a bit of slack removed from the cable, but without photos, it's hard to say.

Front shifting explained

  • Can you please edit this to answer the question - link-only answers are poor but once the links break they're completely useless.
    – Móż
    Jan 4 '17 at 23:55

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