Derailleur hangers

Discussion in 'General Cycling' started by Just zis Guy, you know?, Sep 16, 2011.

  1. Mike's broken the hanger on his Iron Horse MTB. It's a Shimano mech.
    Are the hangers generic or do I have to buy one specially? I don't
    want to trail over to the bike shop unnecessarily.

    Thanks

    Guy
     
    Just zis Guy, you know?, Sep 16, 2011
    #1
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  2. Just zis Guy, you know?

    Ron Lowe Guest

    They seem to be specific to the frame.

    It's the shape of the part that fits into the frame, and the position of
    the hole for the small screw that retains it when the wheel is off.
     
    Ron Lowe, Sep 16, 2011
    #2
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  3. Just zis Guy, you know?

    Rob Morley Guest

    There are loads of different types, but some seem to be a standard of
    sorts.
     
    Rob Morley, Sep 16, 2011
    #3
  4. The hangers go with the frame. If all else fails you could try:
    http://derailleurhanger.com

    --chris
     
    Chris Gerhard, Sep 18, 2011
    #4
  5. OK, thanks all. Yes, frame specific, but luckily the LBS had one in
    stock (albeit for an eye-watering 15 quid!). So Mike's back on the
    road and next time he breaks a hanger he can bloody well pay for it
    himself!

    Guy
     
    Just zis Guy, you know?, Sep 18, 2011
    #5
  6. Just zis Guy, you know?

    Ron Lowe Guest


    If it's just bent, and not actually broken ( caused by dropping the
    biks, and thus causing the rear mech to foul the spokes in the lowest
    gear ), then there exists a tool to check/straighten them. They are
    surprisingly expensive for what they are ( more than you'd want to pay
    for a home workshop unless toy were feeling quite flush ).

    It's just a lever that screws to the hanger, with a guide-piece to align
    it to the rim of a true-ish wheel at various points around it's travel.
    Use it as a guide, then use it as a lever. Heave, HO, and check
    again. Rinse and repeat.

    But the LBS will have one, and it's a 5-minute job to straighten it with
    said tool. If you're on good terms, it may be free :)
     
    Ron Lowe, Sep 18, 2011
    #6
  7. Just zis Guy, you know?

    Rob Morley Guest

    Alternatively just screw an axle into the hanger (tighten the cone
    against the back of the hanger) and tweak until it's parallel with
    one in the dropouts.
     
    Rob Morley, Sep 19, 2011
    #7
  8. Just zis Guy, you know?

    Rob Guest

    Hmmmm, are you sure that's a good idea with aluminium? Might get away if
    it was steel but then who has steel mech hangers? Next time it might
    snap instead of just bending probably when you are mile and miles away
    from home. Is the dérailleur OK?
     
    Rob, Sep 19, 2011
    #8
  9. A hammer with a Park logo?
    It was snapped anyway but it seems to be a shit-metal casting
    (designed to snap in order to protect the mech, says wrench at bike
    shop) so although I have straightened them in the past using the
    standard long adjustable spanner used for straightening miscellaneous
    bent metal objects, this one was past it. And actually it snapped
    above the axle, not below the chainstay, which surprised me.

    Guy
     
    Just zis Guy, you know?, Sep 19, 2011
    #9
  10. Just zis Guy, you know?

    Rob Morley Guest

  11. Just zis Guy, you know?

    Rob Morley Guest

    It's actually intended to protect the frame.
     
    Rob Morley, Sep 19, 2011
    #12
  12. Just zis Guy, you know?

    Rob Morley Guest

    Rob Morley, Sep 19, 2011
    #13
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