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Stiff shift

Started by Dave Larrington · · Last activity · 9 posts · 451 views

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Original section
UK and Europe
Published
24 April 2006
Last activity
25 April 2006
Original author
Dave Larrington
Posts
9
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Public discussion
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451
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  1. Ahoy!

    Swapped out the exceedingly manky SRAM Attack shifters on Cosimo at the
    weekend for some new! SHINY!! non-manky ones. While the rear went on
    without too much trouble, except having to remove the seat/tail fairing
    to see where the cable is supposed to go, and swapping the cable itself
    for one of adequate length - OK with a quite a bit of trouble. The
    front one was a straight swap BUT, the new one seems to require a quite
    phenomenal level of effort to make the shift.

    Can anyone on The Panel suggest where precisely I have been Stupid?

    --
    Dave Larrington - <http://www.legslarry.beerdrinkers.co.uk/>
    I'm just a primitive creature of the heath, so pardon my savage
    ignorance.

  2. Dave Larrington said:

    Ahoy!

    Swapped out the exceedingly manky SRAM Attack shifters on Cosimo at the
    weekend for some new! SHINY!! non-manky ones. While the rear went on
    without too much trouble, except having to remove the seat/tail fairing
    to see where the cable is supposed to go, and swapping the cable itself
    for one of adequate length - OK with a quite a bit of trouble. The
    front one was a straight swap BUT, the new one seems to require a quite
    phenomenal level of effort to make the shift.

    Can anyone on The Panel suggest where precisely I have been Stupid?

    Are they gripshift or trigger jobbies, and which model(s) are the
    shifters and derailleurs? If gripshift, it is quite possible to get the
    cable badly routed inside the things, leading to unwanted friction. Its
    only a slightly fiddly job to take it apart and re-route the cable.

    JimP

    --
    Let's think the unthinkable, let's do the undoable, let's prepare to
    grapple with the ineffable itself, and see if we may not eff it after
    all. - DNA

  3. In article <[email hidden]>, Jim Price

    () said:
    Dave Larrington said:

    Ahoy!

    Swapped out the exceedingly manky SRAM Attack shifters on Cosimo at the
    weekend for some new! SHINY!! non-manky ones. While the rear went on
    without too much trouble, except having to remove the seat/tail fairing
    to see where the cable is supposed to go, and swapping the cable itself
    for one of adequate length - OK with a quite a bit of trouble. The
    front one was a straight swap BUT, the new one seems to require a quite
    phenomenal level of effort to make the shift.

    Can anyone on The Panel suggest where precisely I have been Stupid?

    Are they gripshift or trigger jobbies, and which model(s) are the
    shifters and derailleurs? If gripshift, it is quite possible to get the
    cable badly routed inside the things, leading to unwanted friction. Its
    only a slightly fiddly job to take it apart and re-route the cable.

    Attack grip shifts, operating Ultegra mechs. The rear one is fine and
    you'd think that the front one, being fresh out of the box and still
    using the factory cable, would be too. I put new ones on the
    Speedmachine last year and they behaved admirably from the word "go".

    --
    Dave Larrington - <http://www.legslarry.beerdrinkers.co.uk/>
    Among the calamities of war may be jointly numbered the diminution of
    the love of truth, by the falsehoods which interest dictates and
    credulity encourages.

  4. Quoted message said:

    Can anyone on The Panel suggest where precisely I have been Stupid?

    Did you, though, try the gubbins *before* you attacked Cosimo with it?

    Of course you did ...

    HP

  5. In article <[email hidden]>,

    Uncle Marvo () said:
    Quoted message said:

    Can anyone on The Panel suggest where precisely I have been Stupid?

    Did you, though, try the gubbins *before* you attacked Cosimo with it?

    Of course you did ...

    Christ, Unc, you /must/ be bored...

    --
    Dave Larrington - <http://www.legslarry.beerdrinkers.co.uk/>
    Badger Badger Badger Badger Badger Badger Badger Badger Badger Badger
    Badger Badger Badger Badger Badger Badger Badger Badger Badger Badger

  6. Dave Larrington said:

    Attack grip shifts, operating Ultegra mechs. The rear one is fine and
    you'd think that the front one, being fresh out of the box and still
    using the factory cable, would be too. I put new ones on the
    Speedmachine last year and they behaved admirably from the word "go".

    Sorry, but this is going to seem a little bit like skule.
    Consider fig.1:

    http://www.bikepages.de/images/grip-shift_zahlen_gross.gif

    OK, its a rear shifter, not a front one, but the principle is the same.

    The cable is supposed to run in slot 3 (or "Dichtring zum Schutz vor
    Schmutz" as the original German describes it). Sometimes this fails to
    happen. In order to find out if this is what's wrong, you need to remove
    the cable inner before any other disassembly. While you're doing this is
    a good time to see if its stiff somewhere else along the line, as the
    next bit is the bit you want to avoid if possible. If its difficult or
    impossible to get the cable inner out of the shifter, then assembly 1
    ("Gehäuse des Schaltgriffes"😉 needs to be removed. This is usually the
    cause of two things: panic at how clunky it is to remove, and further
    panic when part number 6 ("Feder"😉 attempts to provide further evidence
    for Newtonian physics being a good approximation of Murphy's law. Having
    found part number 6 (left as an exercise for the reader), and
    disentangled the cable from its incorrect but imaginative (for an
    inanimate object) routing, the whole assembly goes back together in the
    reverse order you took it apart (you may omit hiding part number 6 if
    you so please).

    HTH

    Thanks to bikepages.de for providing (fair I hope) use of fig.1

    JimP
    --
    Let's think the unthinkable, let's do the undoable, let's prepare to
    grapple with the ineffable itself, and see if we may not eff it after
    all. - DNA

  7. Dave Larrington said:

    Ahoy!

    Swapped out the exceedingly manky SRAM Attack shifters on Cosimo at the
    weekend for some new! SHINY!! non-manky ones. While the rear went on
    without too much trouble, except having to remove the seat/tail fairing
    to see where the cable is supposed to go, and swapping the cable itself
    for one of adequate length - OK with a quite a bit of trouble. The
    front one was a straight swap BUT, the new one seems to require a quite
    phenomenal level of effort to make the shift.

    Can anyone on The Panel suggest where precisely I have been Stupid?

    Are the replacement ones Sram as well? The front shifter on the Pino
    is a Sram and has a knurly bit adjacent to the hand grip. Moving the
    knurly bit makes shifting hard or easier depending on the direction
    the knurly bit is moved.

    <fx: goes to garage to check knurly bit>

    Bugger. OK, the previous front shifter had a knurly bit, operating in
    the manner described. The current midel does not. The previous one
    borked as I attempted an emergency down shift when rounding a corner
    to be faced with "scenery".

    Tim

  8. In article <[email hidden]>, Dave

    Larrington () said:

    Ahoy!

    Swapped out the exceedingly manky SRAM Attack shifters on Cosimo at the
    weekend for some new! SHINY!! non-manky ones. While the rear went on
    without too much trouble, except having to remove the seat/tail fairing
    to see where the cable is supposed to go, and swapping the cable itself
    for one of adequate length - OK with a quite a bit of trouble. The
    front one was a straight swap BUT, the new one seems to require a quite
    phenomenal level of effort to make the shift.

    Can anyone on The Panel suggest where precisely I have been Stupid?

    o checks that shifter moves freely when not connected to front der.
    Yep.
    o checks that cable moves freely when not connected to front der.
    Also yep.
    o examines cable routing. May possibly have something to do with it.
    Path of outer cables modified and tight bends therein replaced with V-
    brake noodles found lurking in toolbox.

    Shifting still not as carefree as it was before, but better.

    --
    Dave Larrington - <http://www.legslarry.beerdrinkers.co.uk/>
    Trees, once grown in large numbers, make perfect forests.

  9. In article <[email hidden]>, Tim Hall

    () said:

    Are the replacement ones Sram as well? The front shifter on the Pino
    is a Sram and has a knurly bit adjacent to the hand grip. Moving the
    knurly bit makes shifting hard or easier depending on the direction
    the knurly bit is moved.

    <fx: goes to garage to check knurly bit>

    Bugger. OK, the previous front shifter had a knurly bit, operating in
    the manner described. The current midel does not. The previous one
    borked as I attempted an emergency down shift when rounding a corner
    to be faced with "scenery".

    It has a knurled knob for the adjusting of cable tension, but I kno of
    kno knurly bit such as you describe...

    --
    Dave Larrington - <http://www.legslarry.beerdrinkers.co.uk/>
    Trees, once grown in large numbers, make perfect forests.

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