What kind of riding do you do most of the time?
-Off Trail- New track, no studs
-Soft Trails (semi-groomed)- 120 studs down the center (studs wont do anything for loose snow, just need em to help stop on ice)
-Hard Pack (well-groomed)- toss new studs back in the original holes (just check your track often to make sure it isnt coming apart)
Just my opinion, I have never been a fan of studs, a friend of mine toasted a front heat exchanger last season in prime riding weather from a stud. I am not a fan of stock tracks either, unless we are doing drags, in that case turn the stock one around, lol. Rule of thumb is atleast 1 stud for ever 1hp, too many over that you start tossing on too much rotating mass and lose top speed, but honestly, how often are you trying to do +100 mph that a couple mph off that will hurt? (that also goes back to my dislike for studs, your track whipping around in the tunnel at +100mph with over 150 little spikes aimed at your buddy behind you or your cooler in front)...
Just my opinion, im sure I will amend it sometime after some other opinions are expressed...