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  1. #1
    Member
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    Mar 2010
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    San Antonio, Texas
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    Problems with chain skipping

    Having trouble with what seems to be a skipping chain when in the 34 front and both the 12 and 13 in the back. This is my first non-campy build and it only happens in the 34 and not the 50. The skipping seems to stem mostly from the 34 ring like it may be worn.

    Components:

    Ridley Excalibur frame
    105 shifters
    dura ace fd
    force compact crank
    105 rd
    12-25 dura ace cassette (i think)

  2. #2
    Senior Member
    Join Date
    Aug 2005
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    Pittsburgh, PA
    My Bikes
    '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
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    What you are doing is "cross chaning", that is using the small chainring with the smallest cogs. It's hard on the chain and there is no reason to do so. The 50T chainring with a 19T cog will give the same gear as a 34x13.

    Since the chain is angled so severly in those combinations, I expect the chain is rubbing on and catching on the ramps and other shifting enhansements on the 50T chainring and that is what you are experiencing.

  3. #3
    Junior Member
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    I recently couldn't figure out why my chain was skipping around.. I had a feeling it was the smallest cog I got off with a hammer and punch, but it ended up the RD had a little play in it. Tighted everything up as much as possible and it works great.

  4. #4
    The Left Coast, USA FrenchFit's Avatar
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    Feb 2008
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    I stretched out a chain, 3 years freq. riding, and it would do the same thing. Replacing worn parts is a good idea.

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