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LeopoldBloom · M
Get the shop to unweld it and install a clamp. It’s probably brazed so not difficult to loosen it.
@LeopoldBloom will try that...ty
LeopoldBloom · M
@Whiterosesociety Most bicycle frames are brazed, because welding is too hot and will weaken the metal. So all you need is a small blowtorch to loosen it.