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Old 04-09-13, 04:25 PM   #1
lineinthewater
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crak near dropout

What would you suggest?

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Old 04-09-13, 04:39 PM   #2
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Well paint removal and polishing will let you see the yes/no on the crack.
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Old 04-09-13, 04:41 PM   #3
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Is the frame under warranty? If so, is there a dealer close by, an LBS maybe? I'd bring it there first.

If it's out of warranty, I'd get a buddy to sit on the big and sort of bounce up/down on the pedals while I watched the crack area. If I can visibly see the crack widening, then sure, I think that's confirmation you have a crack. If I don't see a crack, I'd still be suspicious so I'd like scrape paint to check underneath.
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Old 04-09-13, 04:45 PM   #4
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I also would sand the area to check for sure (but not if the bike's under warranty of course ).
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Old 04-09-13, 04:50 PM   #5
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Thanks.

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Old 04-09-13, 04:56 PM   #6
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nvmd.

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Old 04-09-13, 05:04 PM   #7
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thats an odd looking dropout... the axle notch doesn't look nearly deep enough, and where's the derailleur go?? or is that with the hanger removed?
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Old 04-09-13, 05:05 PM   #8
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thats an odd looking dropout... the axle notch doesn't look nearly deep enough, and where's the derailleur go?? or is that with the hanger removed?
Hanger removed.

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Old 04-09-13, 06:06 PM   #9
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Could be tool marks, left from Making the part, too ..
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Old 04-09-13, 06:09 PM   #10
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Could be tool marks, left from Making the part, too ..
Perhaps.

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Old 04-09-13, 06:17 PM   #11
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Could be tool marks, left from Making the part, too ..
Would think you'd see similar on the other DO if that is the case.
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Old 04-09-13, 06:22 PM   #12
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Yep, not there.

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Old 04-09-13, 06:23 PM   #13
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Is the frame under warranty? If so, is there a dealer close by, an LBS maybe? I'd bring it there first.
^^^^^^^^^^^^^^^^^^^^^^^
This.

If the frame isn't under warranty, you'll need to remove the paint from the area to determine if this is really a crack (it is in a common spot for breakage to happen).
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Old 04-09-13, 07:10 PM   #14
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It doesn't look like a crack (to me). It looks like a ridge (like what could have occurred in casting the dropout).
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Old 04-09-13, 07:32 PM   #15
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IMO this is a poor design for an aluminum frame end. The edge of the milled pocket where the hanger attaches is a stress riser and a likely place for failure. But it appears that the crack lines up differently than I would have predicted.

Warranty or no, I'd carefully sand off a bit of paint at one end of the crack and confirm it's int that it's into the metal, though the way it seems to wrap around the area, I'm close to 100% sure it is.

I wouldn't sand the entire length yet lest it give someone an excuse to deny a legitimate warranty claim. If there is a crack, I'd say you have a solid warranty claim based on the limited view of the frames condition.
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Old 04-09-13, 10:05 PM   #16
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I disagree about sanding off any of the paint to check for cracks yourself if you are taking it to the dealers for a warranty claim. Lots of people and companies believe in the "you touch it, you own it rule"....which they sometime also translate to "you touched it, you must have been doing something to it to have caused it somehow".... Let the dealer do the final analysis, preferably, in front of you, so you can observe and maybe take pictures or a short video with your phone if they would let you, so you have a record of the DO inspection/analysis being done, just in case the bike company starts to get wishy-washy about the warranty claim.
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Old 04-10-13, 06:46 AM   #17
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Found a thread with similar mark.

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Old 04-10-13, 06:49 AM   #18
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What frame is yours, as a matter of interest?
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Old 04-10-13, 06:54 AM   #19
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Thanks.

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Old 04-10-13, 09:58 AM   #20
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Originally Posted by Chombi View Post
I disagree about sanding off any of the paint to check for cracks yourself if you are taking it to the dealers for a warranty claim. Lots of people and companies believe in the "you touch it, you own it rule"....which they sometime also translate to "you touched it, you must have been doing something to it to have caused it somehow".... Let the dealer do the final analysis, preferably, in front of you, so you can observe and maybe take pictures or a short video with your phone if they would let you, so you have a record of the DO inspection/analysis being done, just in case the bike company starts to get wishy-washy about the warranty claim.
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+1 I wouldn't touch it either, tempted though I might be.

How old is the frame, and what kind of mileage is on it? Looks pretty new by my standards (I mostly ride a 40 yo steel frame).

In the absence of a catastrophic event, that seems like the kind of damage that just shouldn't occur unless there's a design flaw. Given that, I'd push for repair/replacement whether or not it's under warranty. At the very least they should give you a screaming deal on a new frame.
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Old 04-10-13, 11:21 AM   #21
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In the absence of a catastrophic event, that seems like the kind of damage that just shouldn't occur unless there's a design flaw.
It's happened before, on exactly the same design of dropout, on other very similar Cannondale frames. See the very similar thread the OP found.
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Old 04-11-13, 09:16 AM   #22
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I have the same bike different color, I will check my frame when I get home, I will take pics if you want me too.
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Old 04-11-13, 07:40 PM   #23
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inspected my CAAD7 very closely, no such marks on either side. Mine is the 2005, same year as yours OP.
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