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  1. #1
    yep
    Reputation: yboc's Avatar
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    New bike. On the smallest cog the rear derailleur is collapsed and the chain touches.

    Hey guys, just got my first bike yesterday and I'm still pretty unfamiliar with drivetrain specifics. I took my rear wheel off to get familiar with it, and when I got the wheel back on I shifted through the gears to check it out. When I got to the small cog, the derailleur was fully collapsed and the chain was in a position to cross on itself.

    Now before I took the wheel off I don't think I rode it on the smallest cog, so I'm not sure if it was like that before. And I put everything back in place correctly I believe, but as a beginner I wouldn't put it past myself to accidentely do something incorrect.

    So what's wrong here? Is the chain too long? Did I do something wrong?

    I know that I should avoid being in the lowest chainring and the lowest cog, so is that the problem?

    Thanks for the help. I appreciate it and apologize for my ignorance.

    Oh and also, is there a good online resource for learning about drivetrains and how they work and how to maintain them efficiently?

    Edit:

    Last edited by yboc; 04-04-2013 at 06:52 AM.

  2. #2
    mtbr member
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    It looks like your chain may be too long. Check out the link below.

    Park Tool Co. ParkTool Blog Chain Length Sizing

  3. #3
    yep
    Reputation: yboc's Avatar
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    Hmm, that's weird. I guess I'll have the shop shorten it and help teach me a bit about it.

    Thanks.

    I imagine its still safe to ride it a bit, just avoid that cog?

  4. #4
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    Yes, avoid it. In general you want to avoid cross chaining. That's big cogs-big ring or little cogs-little ring.

  5. #5
    Rub it............
    Reputation: frdfandc's Avatar
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    Chain is a link too long, but definitely avoid the small/small combo.

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