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@number6
possibly -height itself need not be a problem - reach really dictates the fit of a bike
i'd suppose a longer stem (1" ahead style) and possibly longer / more laid back seatpost (27.2) might be needed -
but please see also top tube details in post 19 above - it's deceptively small as a measurement due to steep seat tube .
so whilst top tube length can differ on bikes with the essentially the same reach (and other stem / posts / bars can increase reach) - the real test of size of a bike would be the measurment horizontally from BB to crown of forks as this is fixed
layback added on seatpost/saddle takes you further behind the BB axis - which is what you'd need for longer thighs
also the distance of hands in front of the steerer due to longer stem/bars may affect steering
. but the current bars are of the style as to have little reach on drop beyond the tops anyway- a very 50s style.
a more modern bar with more reach within the bar itself may be used, giving more reach on drops but not having to increase reach on the tops. (so to increase reach on drops and tops - fit other stem, and to increase reach on drops only, fit other bars)
also remember the dropouts on the front are adjustable offset so you can dial in and out more or less trail to tweak the handling and so add more reach in front of the steerer than may be the case had we gone for traditional fork ends.
strangely if you look at a lot of off the peg bikes, the reach seems to remain much more constant than height (in some cases completely so) as the sizes go up. and even more so the wheelbase seems to be constant through differing sizes of a model of bike -
as this was built to be a micro wheelbase (in the 50s/60s they were obsessed by shortening the rear end of the bike- strangely enough without ever bothering to revert to smaller wheels which seems the obvious and easy option) if we'd built it for someone bigger , it would have been built pretty much the same with a higher top tube (and longer seat tube, steerer and possibly seatstays that would necessitate)
my mate of about your size had a short ride of it at l'erioca no probs - come and have a go if you like.