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  1. #1
    TaS
    TaS is offline
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    Check H and L stop when replacing a Hanger

    This is a big duh, but get in a hurry and it cost you a hanger and possibly more.

    I replaced a derailleur hanger that got damaged when drilling out the attaching bolt. Bolted on the new hanger, indexing hit on all points. I assumed (yes when a mistake follows it is an ASSuME) I was good to go.

    Not until looking for that next easiest gear, did I over shift and send the rear derailleur into the wheel. Bending the hanger.

    When I replaced the hanger, it became apparent that I over looked setting the limit screws during the previous install.

    Lesson learned.

    Have a Day

    Tom
    Littleton, Colorado

  2. #2
    Nouveau Retrogrouch SuperModerator
    Reputation: shiggy's Avatar
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    Check H and L stop when replacing a Hanger

    Quote Originally Posted by TaS View Post
    This is a big duh, but get in a hurry and it cost you a hanger and possibly more.

    I replaced a derailleur hanger that got damaged when drilling out the attaching bolt. Bolted on the new hanger, indexing hit on all points. I assumed (yes when a mistake follows it is an ASSuME) I was good to go.

    Not until looking for that next easiest gear, did I over shift and send the rear derailleur into the wheel. Bending the hanger.

    When I replaced the hanger, it became apparent that I over looked setting the limit screws during the previous install.

    Lesson learned.

    Have a Day

    Tom
    Littleton, Colorado
    You need to check the alignment of the hanger before you remount the RD, too. They are rarely straight, even when new.
    mtbtires.com
    The trouble with common sense is it is no longer common

  3. #3
    mtbr member
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    Yes, all great advice.

    Checklist:
    1) Remove old hanger
    2) Check for frame damage
    3) Install new hanger
    4) Check alignment of new hanger
    5) Install, inspect derailleur and chain for damage
    6) Check limit screws of derailleur
    7) Check gear shifting with shifter.
    8) Ride bike up and down driveway to make sure when loaded, bike shifts cool.

  4. #4
    Plays with tools
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    Quote Originally Posted by shiggy View Post
    you need to check the alignment of the hanger before you remount the rd, too. They are rarely straight, even when new.
    .

    This!

  5. #5
    Trail Tire TV on blogger
    Reputation: thomllama's Avatar
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    all good advise above... hangers are almost never truly straight as they have all said...
    Going to try and bring Trail Tire TV back. go take a look... http://trailtiretv.blogspot.com/

  6. #6
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    Check H and L stop when replacing a Hanger

    I feel your pain. I converted my drivetrain to a 1x9 a couple days ago. I wound up ahortening my chain and readjusting the rear derailleur and limit screws, thought i adjusted it correctly and went for a test ride. Im now in the market for a new hanger and derailleur. Im still not sure what i did wrong, i may have cut my chain too short..

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