Another ‘is it cracked?’ – Page 2 – Bike Forum

molgrips · 2019-07-15T10:43:45Z

This is in the middle of the top tube and goes about 2/3 of the way round. I'm thinking it's not a crack simply because it would have snapped in two easily, either when riding or when I bend it in my hands. But it feels firm and there's no flex. Looks like one of those corrosion trails that work their way under the paint on aluminium, but it's a steel frame. There's evidence of rust under the paint. The groove you can see is too small to be felt with a fingernail but it's clearly visible. The reason it's sanded down, btw, is that the frame needs a chainstay repair as well so it's going to be stripped anyway.

chiefgrooveguru

Posts: 14169

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My gut feeling (as an engineer - I’m meant to say that, aren’t I?) is that that is some kind of fatigue failure and if you’ve got that happening in the middle of the down tube, what’s happening elsewhere?

I’m the sort of person who likes to keep stuff for ages and repair it etc but with the cost of repair I’d buy something new or secondhand to replace it.

Posted : 16/07/2019 9:37 am

molgrips

Posts: 91168

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Topic starter

There's no way I can get what I want for anywhere near the cost of repair though.

Posted : 16/07/2019 2:42 pm

molgrips

Posts: 91168

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Topic starter

No WD40 seeped out.

Posted : 16/07/2019 10:27 pm

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[Closed] Another 'is it cracked?'