All comes down to how much weight, type of riding etc how a wheel will hold up on a tandem.
160 mm doesn't guarantee a bullet proof wheel.
Years ago there was a Santana Tripplet that would show up on our Saturday rides with 3 big(6'3" or bigger) weighing over 200+ each. Guy in the rear at a stoplight shifted his weight slightly and the 48 spoke wheel buckled like a wet tortilla.
