Top Tube Crack - Super-X Hi-Mod?

Discuss light weight issues concerning road bikes & parts.
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tojnom
Posts: 19
Joined: Sun Jun 10, 2012 5:56 pm

by tojnom

I was cleaning my Super-X this morning & I noticed a hairline crack in the top tube. It's right down the middle of the tube, about an inch to inch 1/2. I've never wrecked the bike, so I'm little baffled. Does this look like structural damage or just paint?

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by Weenie


rijndael
Posts: 395
Joined: Tue Sep 20, 2011 12:54 pm
Location: Haines, AK - Temporarily

by rijndael

I'm pretty sure I have a mold/seam line on mine, down the middle. It's been there since it was new.

Are you sure it's more than a paint crack? Mine is under the clear coat (there's no paint), and not through it.

I can take a picture of mine tonight.

tojnom
Posts: 19
Joined: Sun Jun 10, 2012 5:56 pm

by tojnom

Yeah, if you don't mind please post a pic tonight. It's probably just a crack in the paint...I thought it was worth posting to see if anyone has had a similar experience.

emorydptt
Posts: 231
Joined: Tue May 05, 2009 2:43 pm
Location: Clermont, FL
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by emorydptt

You can try and do an easy test- tap test with a nickel.
Tap the tube with the nickel and the sound should resonate instead of stop abruptly.
I would imagine if there has never trauma to the bike, then it would be non-structural.
Good luck and let us know.
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rijndael
Posts: 395
Joined: Tue Sep 20, 2011 12:54 pm
Location: Haines, AK - Temporarily

by rijndael

SuperSix HiMod Evo

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tojnom
Posts: 19
Joined: Sun Jun 10, 2012 5:56 pm

by tojnom

emorydptt wrote:You can try and do an easy test- tap test with a nickel.
Tap the tube with the nickel and the sound should resonate instead of stop abruptly.
I would imagine if there has never trauma to the bike, then it would be non-structural.
Good luck and let us know.


Nifty little trick...I think it's fine, the tone was not abrupt & it sounded similar to other areas on the top tube. In retrospect, I used a rubber mallet to push out the SI spindle ...it was stuck in the bottom bracket pretty good. Maybe the impact from the mallet caused a slight crack in the paint. Regardless, the crack seems to be superficial so all is good.

Thanks for the tip.

by Weenie


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