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  1. #1
    Senior Member scoots826's Avatar
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    Rear derailleur not shifting to big gears

    After a pretty bad crash, I got most of the bike fixed. Trued the wheels, straighten the handlebars and brake levers, new grip tape. I had to adjust the rear derailleur but it won't shift to the two largest cogs. Do I need a whole new derailleur? Or is the arm just bent?
    Guinness, the most important meal of the day.

  2. #2
    I have senior moments... bikinfool's Avatar
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    Could be a bent derailleur hanger.
    suum quique
    Mountain bikes: Santa Cruz Hecklers (99, 02, 07), Santa Cruz Nomad, Moots YBB, Trek OCLV Pro Issue, American Breezer
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  3. #3
    cab horn
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    Mes compaingnons cui j'amoie et cui j'aim,... Me di, chanson.

  4. #4
    Senior Member scoots826's Avatar
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    Thanks for the help. Try reading the whole post and not just the title.
    Guinness, the most important meal of the day.

  5. #5
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    after you check to see if the derailleur is bent, try checking your cable slack and your limitation screws. although it is unlikly that a crash could have changed this setting, stranger things have happened. if the derailleur is bent, go buy a new one unless you think you can just bend it back and you are ok with that. if your derailleur hanger is bent, you may need to take it to a shop to rebenf it if you are not comfortable doing it yourself.

    adjustment, then if not, replacement. without pictures, my help can only be general.

  6. #6
    Senior Member scoots826's Avatar
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    Quote Originally Posted by ogbigbird View Post
    after you check to see if the derailleur is bent, try checking your cable slack and your limitation screws. although it is unlikly that a crash could have changed this setting, stranger things have happened. if the derailleur is bent, go buy a new one unless you think you can just bend it back and you are ok with that. if your derailleur hanger is bent, you may need to take it to a shop to rebenf it if you are not comfortable doing it yourself.

    adjustment, then if not, replacement. without pictures, my help can only be general.
    I checked all of those settings. Everything shifts great until the second highest gear. The shifter clicks over, but the derailleur doesn't move. How would I attempt to bend the hanger? Its only tiagra so if I mess it up, no big deal. What pictures would you need to see? From the back of the bike, in the lowest cog? Thanks in advance.
    Guinness, the most important meal of the day.

  7. #7
    Great State of Varmint Panthers007's Avatar
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    From behind with the camera looking down to show where the two pulleys are. First shift it as far as it will move so that it trying to get to where it won't go. We need to look at the angle of the derailleur wheels and body and where it attaches to the bike-frame.

    Rather like this with the RD oriented on the gears you can't shift to:

    Last edited by Panthers007; 11-06-08 at 10:52 PM.
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