I was wrong it's the QR seatpost that has it as part of its clamp design.
Idk if you can make it out here, but if you can find a similar curved metal washer you should be able to mod it with your existing hardware.
@hugo7 started
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I was wrong it's the QR seatpost that has it as part of its clamp design.
Idk if you can make it out here, but if you can find a similar curved metal washer you should be able to mod it with your existing hardware.