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  1. #1
    Senior Member MrCjolsen's Avatar
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    So what happened here?

    I had just resurrected my Miyata 110 fixed gear. The bike had laid unused due to a poor choice of bars and having had a few parts removed for other bikes.

    So I get on for a test ride and things are going well. I stand up and give it some torque and the cranks collapse under me. I barely regain control of the bike and they slip again. I quickly realize what had happened. My cog had slipped.

    Depressed and dejected, I walk the bike back to my garage, thinking that my flip-flop hub will no longer flip nor flop anymore. Sad because one of my planned uses for this bike was for windy days and I was going to run two cogs with as big of a tooth difference as I could fit.

    Anyway, I get home and remove the Dura Ace 16t cog, only to find that the threads on the hub looked as good as new. So did threads in the cog. No play or nothing.

    So I rotofixed it back on and got the lockring real tight (which I know it wasn't before, but I have brakes and use them so I didn't think it was a big deal to go around the block with a not so tight lockring.)

    What's the deal? How could the cog slip without stripping the hub? I've ridden the bike around town a few times thus far and had no problems with this wheel.

  2. #2
    Senior Member beeftech's Avatar
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    You kinda answered your own question.
    The lockring came loose (or was never tightened properly) and let the cog slightly screw and un screw on the hub when you applied pressure.

  3. #3
    Senior Member MrCjolsen's Avatar
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    So it didn't really strip the threads? It just felt like it?

  4. #4
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    take the cog off and check. he can't tell you without seeing it.

  5. #5
    Gentlemen. ADSR's Avatar
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    Maybe your chain is messed up? I've had a chain skip a few links on me before.
    The bums will always lose.

  6. #6
    dmg
    dmg is offline
    Beautiful Member dmg's Avatar
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    If the slipping happened when you were putting pressure on it (instead of backpressure), you probably didn't have the cog threaded fully in the first place. When you mashed it, it got fully tightened. If that's the case, the hub should be fine - you just used the drivetrain as a chain whip.

    Usually when you hear about people stripping their hubs, it's from skidding or applying backpressure (or at least it was with me, the one time that I stripped a hub).

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