Darn, I had pretty much decided to get Stelvios. Black Dog has them for $27. But now this second mention of Kojaks, and Calhoun has those for $27.99...

So, the Kojak is heavier, but in return a little more robust? On the Schwalbe site they rate it a bar faster than the Stelvio - really?

SWMBO has Stelvios on her TSR, and hasn't had a puncture since she got the bike 2 years ago. And she doesn't just ride it in Marin either, it gets punished commuting in SF.

Obviously, I don't want to invite more punctures than necessary. But the Birdy isn't my primary commuter (more my weekend fun bike) so I'd rather go with whichever tire has the performance edge.