After having ridden Continental Super Sport tires on our tandem until the Kevlar showed (I mean this literally, no rubber left on a patch or two of the tire) without one single flat tire in thousands of miles, I’ve gotta give Continental its due on their flat protection. That I could write this is a testament to how good their tires are – it’s not exactly like a tandem is nimble. Those tires have been through it.
Sadly, compared against the lowly Specialized Espoir Sport 28-mm tire, the Conti’s were like riding on a metal rail. Oh, the “rolling resistance” may have been a little lower but the beyond plush Specialized Espoir Sport is simply outstanding by comparison.
The Specialized Espoir tire is the lower end of the Specialized road spectrum but they’ve always been a decent tire, especially as flat protection goes. On our tandem, they’re like riding on a buttered bagel… with cream cheese next to the Conti’s. In fact, they’ve made riding our Co-Motion quite a bit more enjoyable.
At the writing of this post, I’d say we’ve got about 500 exceedingly comfortable, flat-free miles on the Espoir Sport tires and we won’t be going back.
Fit Recovery 
It occurred to me while reading this, that a tandem is carrying twice the weight a normal bike would. This would mean the setup would have to be quite different.
Yes and no. We go with wider tires (28s) at higher pressure (100 psi) with stronger wheels. That takes care of the weight issue.