I'm in Minnesota. I started winter commuting in January 2010. I liked my Nokian W106s, but I didn't like how the tires handled snow.
I was aware of the "fat bike" niche. This summer, I lucked out and got a very lightly used Pugsley for a grand. Score. Decided to give it a silly paint job.
Two steps foward, one back: Endomorph tires don't have studs.
I managed to find some UgiGrip studs here in the US, via Ebay, 1,000 pieces for $42. I don't know how to buy more. Typical US-supplied snowmobile carbide studs are $1 per stud. I don't want to pay $400 for a pair of DIY modified fat tires, especially when the tires themselves are so expensive.
Why buy more? Here's why:
The inner tread of my endos are more worn than the outer tread. I need some shorter studs for the inner rows. UgiGrip has some 8mm studs listed on their site (versus my 11mm studs). I just don't know how to buy them.
EDIT: I've called a few car tire and snowmobile shops in my area. No luck so far.
See large version of attached.