Xcuvator
Husqvarna
Pro Class
I did lots of research into tire studding and based on the terrain up here (at most 2-4 inches of snow, combined with frozen ground, rocks, not much ice riding or heavy snow) had auto studs put in a set of tires (Kenda trackmaster rear and front is a Budd's creek) for the winter and they work awesome, as the tire wears down they also get more effective. I tried ice screws but they wear down really fast and it's a pain to be replacing them. These are supposed to last a season or two. A buddy of mine has Trellobergs and those are awesome, but pricey..
If it weren't for ROCKS a more aggresive stud would be nice. I heard about the Trackmasters and they sound like a popular choice for studs. Also Maxis IT and IRC VE 33/35. It isn't real easy to find a front tire that has knobs large enough for studs.
I would be interested in seeing the pattern you settled on for mixed conditions. Also I have seen the car studs set flush, with only the tip exposed and set 1mm or so proud. I'm not sure which way is best.
You may want to try some Trelleborg/Mitas Winterfriction tyres. This is some great tyres.
I have tried them and i really loved them.
http://www.24mx.com/motocross/p/21-...s/s252/21-inch-studded-dirt-bike-tires/ss1090
http://www.dirtrider.com/gear/141_0612_trelleborg_winter_friction_studded_tires/index.html
http://www.mx1canada.com/Trelleborg-T454-Winter-Friction-Rear-18.html[/quote]
I have heard nothing but good things about the Trelleborg winter tires and if I lived in the cold Northland, they would be my first choice.
Way back in the day, the Metzler knobby was the first choice for mud, if you couldn't afford a Trelle.