The 2 speed wheel is the same spacing as the 3 speed and 6 speed so you could get a 6 speed and swap the wheel, remove the 3 speed cable and shifter and you have a 2 speed.
@Dtroll started
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The 2 speed wheel is the same spacing as the 3 speed and 6 speed so you could get a 6 speed and swap the wheel, remove the 3 speed cable and shifter and you have a 2 speed.