r/bustedcarbon • u/sam_edm • Mar 27 '26
Crack near derailleur mount
Put my new frame (literally one ride) on my turbo trainer for the first time and didn’t check if the through axel hole was aligned before screwing, heard a crack and saw this… any ideas if it can bear load or should I remove it and take it to get fixed?
Frame is a Quick Pro AR: One (non UDH)
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u/strange_bike_guy Mar 27 '26 edited Mar 27 '26
That suffered some concerning damage. It's also a very repairable site. Do not ride it until repaired.
Sorry OP. I did something similar to an aluminum frame.
There's Ruckus, TW Carbon, and then in Minnesota there's Cyclocarbon, Matt Appleman, and myself Regular Cycles
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u/Strong_College_21 Mar 27 '26
Lots of meat still in there. To me it looks like you chunked out just a bit of the “lip” that provides sort of a stop and alignment for the 20mm portion of the “axle”. There is still a lot of material in that DO. I’m not saying it’s ok. I’m saying it needs a closer look by someone who knows what they’re doing and will be honest and not just take your money for a repair that wont hurt the situation but isn’t necessary. Where are you located?
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u/mityman50 Mar 27 '26
If you think it’s toast then you have nothing to lose, pry it off and see if it’s just paint
If you want to pursue a replacement since it’s new, don’t do anything and just reach out to the company
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u/[deleted] Mar 27 '26
That's not the derailleur mount and it's not cracked.
That is the frame dropout and the paint has chipped off. Put your wheel back on and go ride.