SRAM 7sp grip + Shimano Deraileur arm.

Discussion in 'Motorbike Technical Discussion' started by Ian Field, Dec 29, 2011.

  1. Ian Field

    Ian Field Guest

    Was having problems getting 1st gear so tried adjustment - which didn't stay
    set for long, then noticed the cable outer was frayed at the twistgrip.

    Replaced cable outer and set the adjusters as shown how on a youtube clip
    (twistgrip set for highest gear - chain on smallest sprocket - no slack in
    cable), once again it wouldn't select 1st gear.

    Re-adjusted so 1st could be selected - now it won't get 7th.

    Is there an incompatibility between the SRAM twistgrip and the Shimano
    Deraileur lifter?

    Thanks.
     
    Ian Field, Dec 29, 2011
    #1
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  2. finding a pedalbike newsgroup.
     
    Beauregard T. Shagnasty, Dec 30, 2011
    #2
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  3. Ian Field

    . Guest

    As I recall from googling for an inexpensive Shimano grip shifter
    about a month ago, the SRAM components are incompatible with Shimano
    because they move the chain a different number of millimeters with
    each click.
     
    ., Dec 30, 2011
    #3
  4. Ian Field

    Ian Field Guest

    As I recall from googling for an inexpensive Shimano grip shifter
    about a month ago, the SRAM components are incompatible with Shimano
    because they move the chain a different number of millimeters with
    each click.


    Oops! - wrong *.*.tech NG.

    Handy though someone knew the answer.

    Thanks.
     
    Ian Field, Dec 30, 2011
    #4
  5. Not quite. Chainrings are standard and the chain motion needed
    is identical in all cases, but the motion needed at the deraileur is
    not. Mix and match deraileur and shifters and the throw will be
    wrong and you will not hit gears correctly.

    Shimano must be paired with Shimano and Sram with Sram to
    get the correct amount of chain motion for each shift.

    Also, if you start trying to replace Shimano with Sram or vise versa,
    you can have problems with dropout compatibility. ("Dropouts"
    are the small brackets which provide a mounting point for the rear
    deraileur). There's a good chance that a bike frame set up for
    one make of deraileur may not accept the other make unless
    you can make a change to the dropout to get a correct mounting.

    DAMHIK.
     
    Rob Kleinschmidt, Jan 29, 2012
    #5
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