Yes, Virginia, Dura Ace cranks can indeed snap.
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  1. #1
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    Yes, Virginia, Dura Ace cranks can indeed snap.

    Ow......Sucker snapped right in the middle. Out of warranty, my 7800 non-drive side crank arm decided to snap when I was slowly accelerating out of the saddle, on a solo training ride. I was in pain, so I had to walk 3/4 mile home. Drove to the ER, where they discovered three broken ribs. (but just a sore collarbone)….Chugging down Valium to help the pain...…..Before I went to the ER, I jumped on eBay and found a matching 7800 arm for only $38.50......Score one for me...…..Looks like this is going to set me back quite a bit. I'll be lucky to be able to get back on the bike in two weeks, and four for real training...….bummer.
    If your opinion differs from mine, ..........Too bad.
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  2. #2
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    Yes, Virginia, Dura Ace cranks can indeed snap.

    Sorry to hear that, Grumpy. Rest up and relish in the badassness of putting enough power and torque into a crankarm to snap it in two.


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    Last edited by Opus51569; 2 Weeks Ago at 10:10 AM.
    The Law of Headwinds states: If the ride out is easy... wait.

  3. #3
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    Chugging Valium because of the pain. But you had no problem with the pain while searching for parts. Damn that is a true cyclist! Hope you heal fast.

  4. #4
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    First things first......I couldn't let that deal slip away...…$38.50 Buy It Now price. If I didn't get that one, the only other 175mm arm is going for $102.99 Buy it now price, with $7.50 shipping.....(The one I bought had free shipping)
    If your opinion differs from mine, ..........Too bad.
    .
    How would you like it if Hitler killed you
    Dogbert.

    I>U

    Buying parts to hang on your bike is always easier than getting fit.

    If you feel wimpy and weak, get out and train more, ya wee lassie!

    If Jesus had a gun, he'd be alive today!

  5. #5
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    Save the part and start building your "too much power" trophy during your time off!
    Gravel Rocks

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  6. #6
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    OUCH!!! WTF kind of power and weight do you have that can snap a crank arm? You're lucky the broken edge of the crank arm didn't impale your leg!

    Rest up and get better soon!
    "With bicycles in particular, you need to separate between what's merely true and what's important."-- DCGriz, RBR.

    “Statistics are like bikinis. What they reveal is suggestive, but what they conceal is vital.” -- Aaron Levenstein



  7. #7
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    photo?

  8. #8
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    Quote Originally Posted by DaveG View Post
    photo?
    Or it didn't happen?
    Too old to ride plastic

  9. #9
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    This could have been REALLY bad in a field sprint.

    I've been moving rather slow today, but here's some photos...…..
    .
    .Yes, Virginia, Dura Ace cranks can indeed snap.-snap-1.jpgYes, Virginia, Dura Ace cranks can indeed snap.-snap-2.jpg
    If your opinion differs from mine, ..........Too bad.
    .
    How would you like it if Hitler killed you
    Dogbert.

    I>U

    Buying parts to hang on your bike is always easier than getting fit.

    If you feel wimpy and weak, get out and train more, ya wee lassie!

    If Jesus had a gun, he'd be alive today!

  10. #10
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    Quote Originally Posted by MR_GRUMPY View Post
    I've been moving rather slow today, but here's some photos...…..
    .
    .Click image for larger version. 

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    That looks like it had some old break going on, on what looks to be the outer face of the crankarm; or is that darkness caused by the photo?. How far out of warranty is the crank? If not too far out maybe you can convince Shimano that the break actually started while it was in warranty.

    Moving slow is understandable.
    Too old to ride plastic

  11. #11
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    That is a surprising spot for it to break.

  12. #12
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    Quote Originally Posted by DaveG View Post
    That is a surprising spot for it to break.
    Which makes me wonder..., MR_GRUMPY, did you have an argument with someone recently and left your bike unattended for a while? Name:  Emoticon-Think.gif
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  13. #13
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    I dont think you should warranty this. Right now you have an awesome story: you snapped a crank in half, very Badass. Now if the story goes that the crank was replaced as defective, that is not as impressive. A good story is worth $38

  14. #14
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    Quote Originally Posted by DaveG View Post
    I dont think you should warranty this. Right now you have an awesome story: you snapped a crank in half, very Badass. Now if the story goes that the crank was replaced as defective, that is not as impressive. A good story is worth $38
    You must spread some Reputation around before giving it to DaveG again.


    "With bicycles in particular, you need to separate between what's merely true and what's important."-- DCGriz, RBR.

    “Statistics are like bikinis. What they reveal is suggestive, but what they conceal is vital.” -- Aaron Levenstein



  15. #15
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    Maybe so.....To make a story about how I rode over a fallen rider's hand in the final turn of a criterium better. I change it to hopping over his entire body. Like something Peter Sagan would do. As long as you only "modify" a story slightly, it's fair.
    In this case, I don't have to mention that at most, I was only putting 250W into the crank.
    If your opinion differs from mine, ..........Too bad.
    .
    How would you like it if Hitler killed you
    Dogbert.

    I>U

    Buying parts to hang on your bike is always easier than getting fit.

    If you feel wimpy and weak, get out and train more, ya wee lassie!

    If Jesus had a gun, he'd be alive today!

  16. #16
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    Quote Originally Posted by Lombard View Post
    You must spread some Reputation around before giving it to DaveG again.


    Got him for you.
    The Law of Headwinds states: If the ride out is easy... wait.

  17. #17
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    Quote Originally Posted by Opus51569 View Post
    Got him for you.
    Me three.

    Glad you got away with as little injury as you did, MR_GRUMP.
    In a time of universal deceit - telling the truth is a revolutionary act.
    Ben Franklin -Tis curious and amazing to observe how distinct and independent of each other the rattles of this animal are, and yet how firmly they are united together

  18. #18
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    I would still send the crack arm out to a Dura-Ace rep for examination. Their RGA department keep track of stuff like that.
    In a time of universal deceit - telling the truth is a revolutionary act.
    Ben Franklin -Tis curious and amazing to observe how distinct and independent of each other the rattles of this animal are, and yet how firmly they are united together

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