Many of you tandem folk seem to like Contis, makes me want to give them another shot after being disappointed in the Gatorskins I tried some 12 years ago. The tandem I recently bought secondhand came with a front Armadillo labeled 23mm that measures 25.8, and a rear Gatorskin labeled 28mm that measures 27.8. I have been very fond of Vittoria lately and was thinking of getting some 28mm or 30mm Zaffiro Pros to smoothen the ride a little more for our 265lb team (mostly me). The stoker is too short to run a suspension seatpost.