Broken bike seat tube


Old 05-12-19, 12:11 PM
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Broken bike seat tube

Can this be repaired? It is a Trek GT XCR-4000...

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Last edited by PJmax; 05-12-19 at 12:24 PM. Reason: reoriented/resized pictures
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Old 05-12-19, 12:30 PM
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Looks like a severely weight limited setup. In other words..... it comes with a max weight warning. I'd check with the dealer where you got it to see if there is a factory repair or upgrade.

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Old 05-13-19, 03:11 AM
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Its an AL frame but you have a high stress spot with the clamping feature, if you can find someone really good at TIG welding but I;m going to say it's not going to come out good!
Old 05-13-19, 03:37 AM
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Considering the bike's age and value I'd say it's time to look for a new bike. Even if you knew someone who would fix it for free I'd start expecting to find other cracks in the frame.
Old 05-13-19, 06:59 AM
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Rather than repair it with a new weld, and prior to buying a new frame, I would:

See if the seat tube can be cut flush below that crack, and then see if you can get a new quick release with a sleeve to fit over the seat tube. It looks like there may not be enough space between that crack and weld beneath, but you can measure and check.
Old 05-14-19, 07:11 PM
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Do you have a link to a quick release? I have never heard of that?
Old 05-15-19, 09:41 AM
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It looks like the seat tube was not inserted deep enough. Before attempting any repair talk to Trek, they might be willing to salvage a good customer as opposed to having a bike out there with a klutzy weld job, bad advertising. A new frame is not that expensive to them and good PR is very valuable. By asking you are doing them a favor.

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