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My 2c: carbon chainrings are very tough in a 1x situation: tougher than aluminium by far. The teeth only brake when shifting under load, which will never happen on a 1x. Easy savings if you have a mate with a CNC machine and some sandpaper, just get a little 4mm carbon from aliexpress. You can also make other carbon junk: a spider adaptor, elbow rests for aero bars, a “triplizer” spider, disc brake spiders (or whatever they’re called), cassette tools, spanners, phone mounts, “Brompton” pedal plates, even a whole cassette if you have patience and you don’t shift under weight. Serious weight weenie shit there
