The Conti plus series has been around since 2009 if not earlier. That particular tire, the Super Sport Plus, is new for 2012.

I think the Schwalbe Marathon Plus in 700x25 and 28 is new for 2012. I am pretty sure that tire used to go no smaller than 32mm. But whatever--

You have the Marathon Plus 25mm if you really want a tank of a tire-- 580g. Then there's the Durano Plus 25mm available in wire bead (530g) or folding (380g). And finally the Ultremo DD which is 245g but then you're into the protection of a tire like the Conti GP 4000S.

I can't figure why someone would refuse Mr Tuffy Ultra-Light liners at 30g each, but would consider a >500g wire bead tire.