Stripped my crankarm.

Discussion in 'Motorized Bicycle General Discussion' started by Graham, Jan 23, 2009.

  1. Graham

    Graham New Member

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    Will someone please help me from going mad. I was just putting my bike away and decided to see if these pedals my brother gave me would go on my bike. First one went on just fine. Second one wasent so easy. I tried for about 10 minutes before I decided to take a break from it. I looked down at the crank arm to see That I had stripped the top of the threading like an idot. now I have a bike with one pedal. I am looking for the cheapest/ easiest way to repair this. any suggestions would be greatly appreciated.
     
  2. happyvalley

    happyvalley New Member

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    Are we talking 3 piece crank?
    Left side or right and what brand of crank is it?
     
  3. Creative Engineering

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    So you removed your original pedals with no problems? And one of the new one's went on fine but not the other?

    Describe in detail what happened!

    Jim
     
  4. Clotho

    Clotho Member

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    One of the pedals (Can't remember which side) is reverse threaded to prevent it from coming off while pedaling. This is probably why you had a problem and is probably the affected side. You can try reverse threading it back in and see if it still holds. If it does, don't ever take it out again. If this doesn't work you will have to replace the crank arm which is both sides on a one piece crank arm or the affected side on a three piece crank arm.
     
  5. ocscully

    ocscully New Member

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    Helicoil ?

    You might want to check into having a Helicoil installed in the damaged crank arm? But you may find that it is cheaper to just replace the crank arm (3-piece) or the whole crank (1-piece) The left side threads are left hand threads on either set up. The threads on 3-piece cranks are 9/16 in. and the threads on 1-piece cranks are 1/2 in.

    ocscully
     
  6. KDC1956

    KDC1956 New Member

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    Just put a new crank arm on it. They don't cost that much.:-||
     
  7. MB-Monkey

    MB-Monkey New Member

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    we were chatting last night I believe it is a one piece crank set and it is the right side. I suggested knocking the crossed threads down with a file and using some red lock tite if the pedal will screw in if not replacing the one piece crank is what it may take.
     
  8. Graham

    Graham New Member

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    I actually went to a local bike shop and he was able to chase the threads for like 5 bucks. thanks to everyone that helped me with info
     
  9. MB-Monkey

    MB-Monkey New Member

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    glad you got it fixed just goes to show your local bike shop is your friend
     

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