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Framebuilders Thinking about a custom frame? Lugged vs Fillet Brazed. Different Frame materials? Newvex or Pacenti Lugs? why get a custom Road, Mountain, or Track Frame? Got a question about framebuilding? Lets discuss framebuilding at it's finest.

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Old 01-02-10, 10:24 PM   #1
manicmike
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crack?

I guess this is the right forum to post this in, but I figured you guys would know.

I was waxing my bike and found this.



What would cause this?
The only thing i can think of is a slight trailer mishap(operator error!), but everything else seems fine. Help.........

Thanks, Mike
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Old 01-03-10, 10:34 AM   #2
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That's kinda blurry and the lighting is bad. Could you get a better photo?
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Old 01-03-10, 12:12 PM   #3
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I don't know if these pictures help, but it's definitely a crack. Bikes not even a year old.

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Old 01-03-10, 12:54 PM   #4
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What tubeset is it? 525? 520? 501?

The frame is TIG welded and the crack is in the HAZ. It looks like a manufacturing defect to me. I'd make a warranty claim and try to get a new frame.
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Old 01-03-10, 02:11 PM   #5
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It's 520. I will be going to the bike shop in the a.m.
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Old 01-05-10, 01:24 PM   #6
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you can tell there is bulging around that area too. They may have reamed it to make up for their lack of effective heat sinking. They probably see this a lot so they'll deny there is a problem. Most custom bikes built like that nowadays would sleeve that area because it's fairly difficult to support all the loads with just the tube.

Does it have the original seat post?
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Old 01-25-10, 03:58 AM   #7
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It's because the seat tube is too thin.

Just imagine....the seatstays are in compression and they cycle a hundred times a minute, pushing an pulling that piece of tube......until they work harden and crack just like that.

Don't ask me how I know this

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Old 01-25-10, 04:26 PM   #8
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too bad people like this never tell us the resolution to their problem.

on edit: I searched his other threads, he had cross-posted this and Raleigh replaced it

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Old 01-25-10, 04:43 PM   #9
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Originally Posted by unterhausen View Post
too bad people like this never tell us the resolution to their problem.

on edit: I searched his other threads, he had cross-posted this and Raleigh replaced it
That's good to hear.
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