• I'm not a builder, and my only client is an unreasonable fantasist - me. But I'd just drill away and braze on some re-enforcement plates around the hole. After all, no one thinks twice about drilling holes for bottle cage bosses, and a dynamo wire is small by comparison. On my fourth frame I used Di2 grommets for dynamo cable entry and exit.

  • I’ve been meaning to say thanks for replying to my original question. I might just get a framebuilder to do the actual drilling though ;)

  • No worries. I would be tempted to put a reinforcement ring around it, which would definitely require a framebuilder or some garage/kitchen flame-based frame fettling.

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