• the shimano un54 doesn't give the right chainline with these. the shimano bb has jis taper but the cranks need a 107mm with iso taper, this means that the chainline will be out by around 4-5mm. i know because i made this mistake too

    Really? i'l take your word for it, but my friend fitted the un54 107 today and the chainline looked bang on.

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