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  1. 12mm, used by crappy Chinese kit bike brands mafia and a few others, as for a wheel nut, no idea it’s non standard, no bike shops carry it and it’s exactly why brands like these are crap

  2. RandolphCarter2112 on

    Some rear hubs from the late 80s/early 90s have solid 10mm axles with 1mm pitch threads.

    Other rear hub solid axle threadings you might run in to are 9mm with 1mm pitch threads(old MTB and very uncommon), 3/8″ with 26 tpi threading (old freewheel hubs on most anything) or 3/8″ with 24 tpi (coaster brake hubs).

    There are other oddball threading standards out there but I don’t remember them.

    Bring the wheels to a co-op or hardware store and try the nut sizes i mentioned. Most likely the 10mm by 1 will do it.

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