In previous years it was far more explicit but, as you note, there has apparently been a change of heart or marketing pressure to remove the caveats. However, 180 lbs still remains a discrete weight threshold with respect to Campy components, including cranks. Of course, you'd have to read the instructions for a given Campy component to find the residual caveat to wit, here's a link to the current Crankset Instruction sheet: http://www.campagnolo.com/repository...kset-07-05.pdf

Page 18 contains the English version (excerpt appended below) where you'll find a recommendation for anyone weighing over 180 lbs to be vigilant with regard to having their equipment inspected more often for cracks, etc..

Not quite. While the captain's cranks and stoker's left-side crank carry no more of a load than they do on a single bike, the stoker's drive-side crank arm & rings as well as the bottom bracket DO, in fact, carry the cumulative loads of both the captain and stoker: how else would the captain's power contributions get to the rear wheel?

While the stoker's seat post doesn't deal with any additional loading vs. what would be experienced on a single bike, the captain's seat post must deal with an entirely different set of loads generated by the stoker via their handlebars and the stoker stem connected to the captain's seatpost. It could even be argued that a captain's stem and handlebars will for most average teams deal with more torsional loads associated with countering 'stoker steer' and impacts from road obstacles that must be ridden over vice being bunny-hopped on a single bike. While the magitude of the additional loads placed on the seat posts, stems and handlebars are no where close to 2x what a single rider would generate (which is nearly the case for the left-side drive crank and rear BB), they are greater and those differences should not be dismissed when selecting components for a tandem.
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