Another thing to do is to overinflate the tube once you've installed the tire to make sure the bead of the tire is seated all the way around. Let's say your tire is rated 80 psi; pump it up to 100 and then let air out back down to 80. You may hear the pop of the bead seating itself during this process. I suspect yours wasn't fully seated.

Studded tires DO ride more roughly than regular ones, too.