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Badly bent chainwheel (front sprocket), advice please!

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Badly bent chainwheel (front sprocket), advice please!

Old 03-10-09, 05:27 PM
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SSkid
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Badly bent chainwheel (front sprocket), advice please!

So the story goes:

I lent my old peugeot to a friend to ride around and he calls me one night telling me something went badly wrong. Turns out the the front sprocket that attaches to the crank is bent... not just a little bent... bent nearly in half. My friend claims he didn't crash it or anything... he was just riding along and next thing he knew, bam! I'm not sure whether to believe him, but I'm wondering if it could have something to do with how the bike was converted to a single speed... like maybe too much pressure put on the chainwheel or something... plus he's a pretty big guy, about 240lb. Any thoughts on the cause, and also, do I need a completely new crank or just a new chainwheel... thanks for any advice!
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Old 03-10-09, 05:33 PM
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zonatandem
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Hey the bike stood there leaning against the wall and that stupid chainring bent itself!
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Old 03-10-09, 06:24 PM
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Originally Posted by SSkid View Post
So the story goes:

I lent my old peugeot to a friend to ride around and he calls me one night telling me something went badly wrong. Turns out the the front sprocket that attaches to the crank is bent... not just a little bent... bent nearly in half. My friend claims he didn't crash it or anything... he was just riding along and next thing he knew, bam! I'm not sure whether to believe him, but I'm wondering if it could have something to do with how the bike was converted to a single speed... like maybe too much pressure put on the chainwheel or something... plus he's a pretty big guy, about 240lb. Any thoughts on the cause, and also, do I need a completely new crank or just a new chainwheel... thanks for any advice!
That is entirely possible. Especially if the chainring was spaced out.
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Old 03-10-09, 06:49 PM
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Panthers007
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You need to examine it. At least - he owes you a new chainring.
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Old 03-10-09, 07:59 PM
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Originally Posted by SSkid View Post
So the story goes:

I lent my old peugeot to a friend to ride around and he calls me one night telling me something went badly wrong. Turns out the the front sprocket that attaches to the crank is bent... not just a little bent... bent nearly in half. My friend claims he didn't crash it or anything... he was just riding along and next thing he knew, bam! I'm not sure whether to believe him, but I'm wondering if it could have something to do with how the bike was converted to a single speed... like maybe too much pressure put on the chainwheel or something... plus he's a pretty big guy, about 240lb. Any thoughts on the cause, and also, do I need a completely new crank or just a new chainwheel... thanks for any advice!
At a minimum a new chainring, which may be problematic depending on the crank. Check the crank to make sure the spider isn't bent someplace as well.
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