I liked the Nitto Exo Grapplers better on ice than any other non-studded tire I've run. I switched back to studded tires mid winter this year, because the Nittos had done such a good job up till then.
That said, on ice, nothing beats studs, and having two sets of tires is the way to go (although I will certainly admit that it can be a PITA).
Usain Bolt can't run fast enough to give me a set of Duratracks. I suspect the same applies to anybody that rode in my truck while it was wearing them, but to each his own.
