I am talking about the Nokian Extreme 294 29"x2.1.
I've found that 700c studded tires are superior to 26" ones for winter cycling - the difference is most apparent on hard-packed snow and bumpy ice. Now, I've been using the Nokian Hakkapelitta's 700c studded tires, and while they offered much better stability than any of the 26" ones, I really felt that the low number of studs (106) was a huge disadvantage. Also, the largest Hakkapelitta's are just 47 mm (47-6 22).
The Nokian Extreme 294 29"x2.1 should be the answer to my prayers.
It's september, and I haven't even smelled these tires, let alone seen them. Has anyone? Any info on where they can be bought?