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Dent on down tube: to ride or not to ride

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Dent on down tube: to ride or not to ride

Old 07-17-07, 11:31 PM
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dachoe
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Dent on down tube: to ride or not to ride

I obtained a 1999 Cannondale R500. It has a dent on the down tube. Attached are a couple pics. Is this bike still rideable, or should I trash the frame? Thanks in advance.
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dent.JPG (43.2 KB, 65 views)
File Type: jpg
dent 2.JPG (45.3 KB, 47 views)
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Old 07-17-07, 11:37 PM
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jtown
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It's probably ok.
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Old 07-18-07, 12:56 AM
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Mach42
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Stresses on the downtube pull the tube apart, rather than compressing it like the top tube and seat tube. Since dents are the cause of tube crushing and failure due to pushing, you should be ok. A dented aluminum can is still hard to pull apart, while the same can is much easier to crush.
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Old 07-18-07, 05:57 PM
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dachoe
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Thanks for the replies. They were helpful.
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Old 07-18-07, 06:33 PM
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jtown
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For me though I wouldn't be able to live with a dented frame because it'd be an eye sore for me. =D

That probably didn't help any.
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Old 07-18-07, 08:51 PM
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Right, the downtube is always in tension. There actually used to be a mountain bike called the sling shot that didn't have a downtube, but had a spring tensioned cable. Supposed to allow the frame to bend and store energy around a turn and then sling shot you out of it. Probably didn't ever work that well.
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Old 07-18-07, 08:53 PM
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Mose
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Well, what do you know. They're still in business:



www.slingshotbikes.com
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Old 07-18-07, 10:07 PM
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Yeah, ride it.
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