Here's a page with some info on pricey kits and a cool video. Looks like fun. Some videos on youtube too under "snow bike".
I think I saw a member here that put a ski on the front of his TW.
Snow mobile track studs on stock tires
front ski vs wheel ?
There ain't much that Gizmow hasn't already tried.
I can explain it to you, but I can't understand it for you.
Powdercoated '87 frame, extended swingarm, YZ fork legs, ATV tire, 14/55, XT350 tank, spliced quick-release seat, disc brake conversion, beeg headlight, beeger rack, Lizrdcooler, Lizrdventz and bunch of other stuff all covered in invisible ink.
Finally got some snow so I can perform some actual testing of the "sheet metal screw" idea (as tire studs) in the front tire. Wish I could report some reliable info, but the jury is still out. I have the SR244.
Tire only (no SM studs) aired down = marginal in virgin not ridden snow. If packed snow, not good at all.
With SM Studs = If packed snow, better than no studs, but still more movement than I'm comfortable with.
I ran out of screws and need to get more. I plan on placing more studs in.
This is the conclusion I'm coming too as well. I'm on the lookout for a small set of tire chains I could maybe use on the front tire, similar to mrgizmow's cable chains. For the type of riding I do in the winter, (off road), chains should work. Still want to fiddle with the sheet metal screws some more before I rule them in or out.