If the geometry chart is true (!) there is only a 5mm length difference between 56 and 58. So it comes down to, do you want a 160mm headtube or a 180mm? :)
Well spotted.
@Stanky started
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If the geometry chart is true (!) there is only a 5mm length difference between 56 and 58. So it comes down to, do you want a 160mm headtube or a 180mm? :)