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Tandem Cycling A bicycle built for two. Want to find out more about this wonderful world of tandems? Check out this forum to talk with other tandem enthusiasts. Captains and stokers welcome!

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Old 01-17-07, 10:39 AM   #1
Xanti Andia
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opinion on two dents on a used bike I am looking at?

Can I have an opinion on these two dents on a used bike I am looking at? Are they purely cosmetic or can they have an effect on the integrity of the frame? It is a CroMo frame.
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Old 01-17-07, 10:45 AM   #2
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Cosmetic. The big one is on the down tube, which is a tension member, so it shouldn't matter at all. The little on is on the side of the top tube, which is a bit more of a concern, but it's such a small dent, that I wouldn't worry about it.

Nice S&S couplings by the way.
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Old 01-17-07, 11:14 AM   #3
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Originally Posted by waterrockets
Cosmetic. The big one is on the down tube, which is a tension member, so it shouldn't matter at all. The little on is on the side of the top tube, which is a bit more of a concern, but it's such a small dent, that I wouldn't worry about it.
Agreed, the dents themselves are not likely to be issues of impending frame failure but wouldn't a buyer observing them want to get that ruler out again and go over the alignment of the entire bicycle? Probably should be done anyway even if a bike looks cosmetically perfect, but here we have definite evidence of incidents in the past, minor or otherwise.
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Old 01-17-07, 11:28 AM   #4
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Originally Posted by Xanti Andia
Can I have an opinion on these two dents on a used bike I am looking at? Are they purely cosmetic or can they have an effect on the integrity of the frame? It is a CroMo frame.
What did the folks at Co-Motion say when you sent them your question with your photos...???

I've seen worse and don't disagree that they're probably cosmetic; however, I would recommend getting the "best" informed assessment you can and that would most certainly come from the builder.

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Old 01-17-07, 11:31 AM   #5
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Originally Posted by waterrockets
The little on is on the side of the top tube, which is a bit more of a concern, but it's such a small dent, that I wouldn't worry about it.
Hmmm. Never seen a threaded water bottle boss on the top tube of a Co-Motion tandem.
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Old 01-17-07, 11:34 AM   #6
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What did the folks at Co-Motion say when you sent them your question with your photos...???
I did not ask them, perhaps I should, but good job identifying the maker!
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Old 01-17-07, 02:35 PM   #7
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Originally Posted by TandemGeek
Hmmm. Never seen a threaded water bottle boss on the top tube of a Co-Motion tandem.
Oh, c'mon, it's the latest rage.

<my bad> got thrown by the angle, and thought I was seeing rear brake cable. Maybe that's just a bolt head and washer balanced on top of the tube
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Old 01-18-07, 05:44 AM   #8
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Looks like my frame!!! You can't go wrong... so long as CO MO agrees the dents are not a concern.
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Old 01-18-07, 09:19 PM   #9
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Since they're so close to the coupler, they shouldn't be a concern. But by the same token, shouldn't competent builder be able to get in there and fix that?
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