We have been riding Maxxis Re-Fuse for the last couple years on our Zona tandem.
We run 700x25s and weigh just under 250 lbs as a team.
Great flat protection; mileage runs around the 2,000 mark for the rear tire.
Am currently testing a Pasela TG 700x25 but had tro reduce recommended air pressure by 5 lbs (down to 110 PSI) due to complaints by stoker of the harsher ride than the Re-Fuse which we run at 120 PSI.
Just our input . . .