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Jun 14, 2023 at 1:31 comment added Austin Hemmelgarn Note that this may require temperatures up to 400 degrees Celsius (the typical upper end of the range of Curie temperatures seen with neodymium magnets). If the frame is steel this is probably fine, but I would be wary with aluminum (that’s high enough to significantly weaken most common aluminum alloys, at least temporarily), and I would not even consider it around carbon fiber.
Jun 12, 2023 at 19:40 comment added MaplePanda @DavidW A soldering iron is a great suggestion. Probably not a good idea with plastic parts, but for metal seatpost clamps, fenders, bottle cages, etc, it would work well.
Jun 12, 2023 at 19:32 comment added DavidW What about a soldering iron? That might be able to quite precisely apply the heat to the magnet itself. (Since the question talks about accessories, I'd be worried about transmitted heat from a screw at 80C melting plastic mounts.)
Jun 12, 2023 at 18:13 history answered Criggie CC BY-SA 4.0