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M_V
I'm not using either, in fact I've specifically passed up on some HT2 cranks (in favour of square taper) for kids bikes where I want to make the q-factor as narrow as possible. TBH, I've never worked out how the HT2 BB and crank combinations are meant to work with regard to 68mm vs 73mm BB shells. From what I can work out (happy to be corrected), they use the same width BB, but just use fewer spacers if you have a 73mm shell, so there's no reduction in q-factor as a result of having a narrower (68mm) BB shell, which seems nuts.