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Fed up with the “woolly” shifting on my 105’s…

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  • January 12, 2014 at 11:25 am #20452
    jasonm945

    So ultimately the question is, are Sram Rival shifters and rear mech an “upgrade” or am I just spending money for the sake of it?

    I do prefer sram’s clunkiness(?) on my MTB but not sure if that would cross over to the road, I am also finding that my 105 is very woolly and occasionally misses a shift (especially going down the cassette).

    Suggestions?

    Thanks

    Jay

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  • January 12, 2014 at 2:47 pm #768055
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    glynr36

    Could be a mulitude of
    Could be a mulitude of things.
    I had shifting issues like that last year (Campag Athena), replaced cables & outers, set up the mech time and time again, in the end it was found that my hanger was a bit bent, and the cassette & chain were shot.
    How old are the chain and cassette?

    January 12, 2014 at 12:39 pm #768053
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    jasonm945

    Don’t get me wrong my 105 is
    Don’t get me wrong my 105 is usually faultless, I just sometimes over shift but only move 1 cog. I also don’t feel the shifts are “positive”. Are sram shifters as industrial as they are on MTB’s?

    January 12, 2014 at 12:38 pm #768051
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    numbercruncher

    Have you been running the
    Have you been running the 105’s for a while? It is possible that a bit of cable stretch could be enough to make the shifting slightly off, particularly if they are quite new and just bedded in.
    I would agree that adjustment/lubrication should be the first port of call. You can reset the adjustment pretty much from scratch pretty easily. I did mine after a few weeks when they had bedded in and they run pretty smooth with just an occasional tweak of the barrel adjuster if necessary.
    You tube has loads of guidance videos if needed.
    Can’t comment on the relative merits of Sram though.

    January 12, 2014 at 12:14 pm #768049
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    matthewn5

    105 as with most Shimano
    105 as with most Shimano shifters is normally very crisp. So you probably need to see what the problem is first.

    Have a look at the cables/derailleur adjustment and lubrication before doing anything rash.

    As a last resort I recommend replacing the upper guide pulley — which has rubber bushes allowing it to cushion/soften the shift — with an alloy ceramic bearing pulley (c. £12 on ebay). That will give you a crisper shift but it may feel harsher than normal.

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